1
                                                                     EXHIBIT 4.3

                          REGISTRATION RIGHTS AGREEMENT


                  This Registration Rights Agreement (this "Agreement") is made
and entered into as of July 18, 1997, by and among Cayenne Software, Inc., a
Massachusetts corporation (the "Company"), and Southbrook International
Investments, Ltd. a corporation organized and existing under the laws of the
British Virgin Islands (the "Purchaser").

                  This Agreement is made pursuant to the Convertible Preferred
Stock Purchase Agreement, dated as of the date hereof, by and among the Company
and the Purchaser (the "Purchase Agreement"). The execution of this Agreement is
a condition to the closing of the transactions contemplated by the Purchase
Agreement.

                  The Company and the Purchaser hereby agree as follows:

      14.         Definitions

                  Capitalized terms used and not otherwise defined herein shall
have the meanings given such terms in the Purchase Agreement. As used in this
Agreement, the following terms shall have the following meanings:

                  "Advice" shall have meaning set forth in Section 3(o).

                  "Affiliate" means, with respect to any Person, any other
Person that directly or indirectly controls or is controlled by or under common
control with such Person. For the purposes of this definition, "control," when
used with respect to any Person, means the possession, direct or indirect, of
the power to direct or cause the direction of the management and policies of
such Person, whether through the ownership of voting securities, by contract or
otherwise; and the terms of "affiliated," "controlling" and "controlled" have
meanings correlative to the foregoing.

                  "Business Day" means any day except Saturday, Sunday and any
day which shall be a legal holiday or a day on which banking institutions in the
state of New York generally are authorized or required by law or other
government actions to close.

                  "Certificate of Vote" shall have the meaning set forth in
Section 4.

                  "Commission" means the Securities and Exchange Commission.

                  "Common Stock" means the Company's Common Stock, par value
$0.01 per share.

                  "Effectiveness Date" means (i) with respect to the
Registration Statement to be filed with respect to the Series C Shares, the
100th day following the Initial Series C Closing Date, (ii) with respect to the
Registration Statement to be filed with respect to the Series D Shares, the
100th day following the Series D Closing Date, and (iii) with respect to the

                                      -1-
   2




Registration Statement to be filed with respect to the Series E Shares, the
100th day following the Series D Closing Date.

                  "Effectiveness Period" shall have the meaning set forth in
Section 2(a).

                  "Event" shall have the meaning set forth in Section 4.

                  "Event Date" shall have the meaning set forth in Section 4.

                  "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

                  "Filing Date" means (i) with respect to the shares of Common
Stock issuable upon conversion of the Series C Shares and exercise of the Series
C Warrants, the 30th day following the Initial Series C Closing Date, (ii) with
respect to the shares of Common Stock issuable upon conversion of the Series D
Shares and the Series D Warrants, the 30th day following the Series D Closing
Date, and (iii) with respect to the shares of Common Stock issuable upon
conversion of the Series E Shares and exercise of the Series E Warrants, the
30th day following the Series E Closing Date.

                  "Holder" or "Holders" means the holder or holders, as the case
may be, from time to time of Registrable Securities.

                  "Indemnified Party" shall have the meaning set forth in
Section 6(c).

                  "Indemnifying Party" shall have the meaning set forth in
Section 6(c).

                  "Initial Series C Closing Date" means the date of the issuance
and sale of the Initial Series C Shares pursuant to the Purchase Agreement.

                  "Initial Series C Shares" means the shares of Preferred Stock
issued and sold on the Initial Series C Closing Date pursuant to the Purchase
Agreement.

                  "Losses" shall have the meaning set forth in Section 6(a).

                  "Managing Underwriter" means any managing underwriter retained
by a Holder in connection with the offer and sale of Registrable Securities.

                  "Person" means an individual or a corporation, partnership,
trust, incorporated or unincorporated association, joint venture, limited
liability company, joint stock company, government (or an agency or political
subdivision thereof) or other entity of any kind.

                  "Preferred Stock" means the shares of Series C, Series D and
Series E Convertible Preferred Stock, par value $1.00 per share, of the Company
issued to the Purchaser pursuant to the Purchase Agreement.

                  "Proceeding" means an action, claim, suit, investigation or
proceeding (including, without limitation, an investigation or partial
proceeding, such as a deposition), whether commenced or threatened.




                                      -2-
   3




                  "Prospectus" means the prospectus included in the Registration
Statement (including, without limitation, a prospectus that includes any
information previously omitted from a prospectus filed as part of an effective
registration statement in reliance upon Rule 430A promulgated under the
Securities Act), as amended or supplemented by any prospectus supplement, with
respect to the terms of the offering of any portion of the Registrable
Securities covered by the Registration Statement, and all other amendments and
supplements to the Prospectus, including post-effective amendments, and all
material incorporated by reference or deemed to be incorporated by reference in
such Prospectus.

                  "Registrable Securities" means (a) with respect to the
Registration Statement to be filed after the Initial Series C Closing, the
shares of Common Stock issuable upon conversion of the Series C Shares, shares
of Common Stock issuable upon exercise of the Series C Warrants, and shares of
Common Stock issuable as payment of dividends on the Series C Shares, (b) with
respect to the Registration Statement to be filed after the Series D Closing,
the shares of Common Stock issuable upon conversion of the Series D Shares, the
shares of Common Stock issuable upon exercise of the Series D Warrants and the
shares of Common Stock issuable as payment of dividends on the Series D Shares,
and (c) with respect to the Registration Statement to be filed after the Series
E Closing, the shares of Common Stock issuable upon conversion of the Series E
Shares, shares of Common Stock issuable upon exercise of the Series E Warrants
and the shares of Common Stock issuable as payment of dividends on the Series E
Shares; provided, however that in order to account for the fact that the number
of shares of Common Stock that are issuable upon conversion of shares of
Preferred Stock is determined in part upon the market price of the Common Stock
at the time of conversion, in the case of each (a), (b) and (c), Registrable
Securities shall include a number of shares of Common Stock equal to no less
than the sum of (1) two times the number of shares of Common Stock issuable upon
conversion in full of the Preferred Stock, assuming such conversion occurred on
the particular Closing Date for such shares of Preferred Stock, (2) the number
of shares of Common Stock issuable upon exercise in full of the Warrants,
assuming such exercise occurred on the particular issuance date for such
Warrants, and (3) the number of Shares of Common Stock issuable on payment of
dividends on such shares of Preferred Stock for the one year period after the
applicable Closing Date, or such other number of shares of Common Stock as
agreed to by the parties to the Purchase Agreement. Notwithstanding anything
herein contained to the contrary, if the actual number of shares of Common Stock
into which the Preferred Stock is convertible exceeds twice the number of shares
of Common Stock into which particular shares of Preferred Stock are convertible
based upon a computation as at a particular Closing Date, the term "Registrable
Securities" shall be deemed to include such additional shares of Common Stock.
If an additional Registration Statement is required to be filed because the
actual number of shares of Common Stock into which the Preferred Stock are
convertible, plus shares issuable upon payment of dividends as described above
and shares issuable upon exercise of the Warrants exceeds the number of shares
of Common Stock initially registered in respect of any particular series of
Preferred Stock based upon the computation on a particular Closing Date, the
Company shall have 10 Business Days after it makes such a determination or
receives notice from the Holders of Registrable Securities as to such a
determination to file such additional Registration Statement in accordance with
the terms hereof.

                  "Registration Statement" means the registration statement,
contemplated by Section 2(a) (and any additional Registration Statements
contemplated in the definition of Registrable Securities), including (in each
case) the Prospectus, amendments and supplements



                                      -3-
   4




to such registration statement or Prospectus, including pre- and post-effective
amendments, all exhibits thereto, and all material incorporated by reference or
deemed to be incorporated by reference in such registration statement.

                  "Rule 144" means Rule 144 promulgated by the Commission
pursuant to the Securities Act, as such Rule may be amended from time to time,
or any similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

                  "Rule 158" means Rule 158 promulgated by the Commission
pursuant to the Securities Act, as such Rule may be amended from time to time,
or any similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

                  "Rule 415" means Rule 415 promulgated by the Commission
pursuant to the Securities Act, as such Rule may be amended from time to time,
or any similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

                  "Securities Act" means the Securities Act of 1933, as amended.

                  "Series C Shares" means, collectively, the Initial Series C
Shares and the Subsequent Series C Shares pursuant to the Purchase Agreement.

                  "Series D Shares" means the shares of Preferred Stock issued
and sold on the Subsequent Series D Closing Date pursuant to the Purchase
Agreement.

                  "Series D Closing Date" means the date of the issuance and
sale of the Series D Shares pursuant to the Purchase Agreement.

                  "Series E Shares" means the shares of Preferred Stock issued
and sold on the Subsequent Series E Closing Date pursuant to the Purchase
Agreement.

                  "Series E Closing Date" means the date of the issuance and
sale of the Series E Shares pursuant to the Purchase Agreement.

                  "Subsequent Series C Shares" means the shares of Preferred
Stock issued and sold on the Subsequent Series C Closing Date pursuant to the
Purchase Agreement.

                  "Initial Series C Closing Date" means the date of the issuance
and sale of the Initial Series C Shares pursuant to the Purchase Agreement.

                  "Tranche 2 Closing Date" means the date of the issuance and
sale of the Tranche 2 Debentures pursuant to the Purchase Agreement.

                  "Tranche 2 Debentures" means the Debentures issued and sold to
the Purchaser on the Tranche 2 Closing Date.




                                      -4-
   5




                  "Tranche 3 Closing Date" means the date of the issuance and
sale of the Tranche 3 Debentures pursuant to the Purchase Agreement.

                  "Tranche 3 Debentures" means the Debentures issued and sold to
the Purchaser on the Tranche 3 Closing Date.

                  "Special Counsel" means any special counsel to the Holders,
for which the Holders will be reimbursed by the Company pursuant to Section 4.

                  "Underwriter" means any underwriter retained by a Holder in
connection with the offer and sale of Registrable Securities.

                  "Underwritten Registration or Underwritten Offering" means a
registration in connection with which securities of the Company are sold to an
underwriter for reoffering to the public pursuant to an effective registration
statement.

                  "Warrants" means the Common Stock purchase warrants issued to
or as directed by the Purchaser on each Closing Date.

      XV          Shelf Registration

                  1. On or prior to each applicable Filing Date the Company
shall prepare and file with the Commission a "Shelf" Registration Statement
covering all Registrable Securi ties for an offering to be made on a continuous
basis pursuant to Rule 415. The Registration Statement shall be on Form S-3 (or
another appropriate form approved by the Holders of a majority of the
Registrable Securities that permit registration of Registrable Securities for
resale by the Holders in the manner or manners designated by them (including,
without limitation, public or private sales and one or more Underwritten
Offerings)). The Company shall (i) not permit any securities other than the
Registrable Securities and those securities specifically listed on Schedule 8
attached hereto, to be included in the Registration Statement and (ii) use its
best efforts to cause the Registration Statement to be declared effective under
the Securities Act as promptly as possible after the filing thereof, but in any
event prior to the Effectiveness Date, and to keep such Registration Statement
continuously effective under the Securities Act until the date which is two
years after the date that such Registration Statement is declared effective by
the Commission or such earlier date when all Registrable Securities covered by
such Registration Statement have been sold or may be sold pursuant to Rule 144
without volume restrictions as determined by the counsel to the Company pursuant
to a written opinion letter, addressed to the Holders, to such effect (the
"Effectiveness Period"); provided, however, that the Company shall not be deemed
to have used its best efforts to keep the Registration Statement effective
during the Effectiveness Period if it voluntarily takes any action that would
result in the Holders not being able to sell the Registrable Securities covered
by such Registration Statement during the Effectiveness Period, unless such
action is required under applicable law or the Company has filed a
post-effective amendment to the Registration Statement and the Commission has
not declared it effective.

                  2. If the Holders of a majority of the Registrable Securities
so elect, an offering of Registrable Securities pursuant to the Registration
Statement may be effected in the form of an Underwritten Offering. In such
event, and if the Managing Underwriters advise the Company and such Holders in
writing that in their opinion the amount of Registrable



                                      -5-
   6




Securities proposed to be sold in such Underwritten Offering exceeds the amount
of Registrable Securities which can be sold in such Underwritten Offering, there
shall be included in such Underwritten Offering the amount of such Registrable
Securities which in the opinion of such Managing Underwriters can be sold, and
such amount shall be allocated pro rata among the Holders proposing to sell
Registrable Securities in such Underwritten Offering.

                  3. If any of the Registrable Securities are to be sold in an
Underwritten Offering, the investment banker or investment bankers and manager
or managers that will administer the offering will be selected by the Holders of
a majority of the Registrable Securities included in such offering. No Holder
may participate in any Underwritten Offering hereunder unless such Person (i)
agrees to sell its Registrable Securities on the basis provided in any
underwriting agreements approved by the Persons entitled hereunder to approve
such arrangements and (ii) completes and executes all questionnaires, powers of
attorney, indemnities, underwriting agreements and other documents required
under the terms of such arrangements.


      XVI         Registration Procedures

                  In connection with the Company's registration obligations
hereunder, the Company shall:

                  1. Prepare and file with the Commission on or prior to each
applicable Filing Date a Registration Statement on Form S-3 in accordance with
the method or methods of distribution thereof as specified by the Holders, and
cause the Registration Statement to become effective and remain effective as
provided herein; provided, however, that not less than five (5) Business Days
prior to the filing of the Registration Statement or any related Prospectus or
any amendment or supplement thereto (including any document that would be
incorporated or deemed to be incorporated therein by reference), the Company
shall (i) furnish to the Holders, their Special Counsel and any Managing
Underwriters, copies of all such documents proposed to be filed, which documents
(other than those incorporated or deemed to be incorporated by reference) will
be subject to the review of such Holders, their Special Counsel and such
Managing Underwriters, and (ii) cause its officers and directors, counsel and
independent certified public accountants to respond to such inquiries as shall
be necessary, in the reasonable opinion of respective counsel to such Holders
and such Underwriters, to conduct a reasonable investigation within the meaning
of the Securities Act. The Company shall not file the Registration Statement or
any such Prospectus or any amendments or supplements thereto to which the
Holders of a majority of the Registrable Securities, their Special Counsel, or
any Managing Underwriters, shall object.

                  2. (i) Prepare and file with the Commission such amendments,
including post-effective amendments, to the Registration Statement as may be
necessary to keep the Registration Statement continuously effective for the
Effectiveness Period and prepare and file with the Commission such additional
Registration Statements in order to register for resale under the Securities Act
all of the Registrable Securities; (ii) cause the related Prospectus to be
amended or supplemented by any required Prospectus supplement, and as so
supplemented or amended to be filed pursuant to Rule 424 (or any similar
provisions then in force) promulgated under the Securities Act; (iii) respond as
promptly as practicable to any comments received from the Commission with
respect to the Registration Statement or any amendment thereto and



                                      -6-
   7




promptly provide the Holders true and complete copies of all correspondence from
and to the Commission relating to the Registration Statement; and (iv) comply
with the provisions of the Securities Act and the Exchange Act with respect to
the disposition of all Registrable Securities covered by the Registration
Statement during the applicable period in accordance with the intended methods
of disposition by the Holders thereof set forth in the Registration Statement as
so amended or in such Prospectus as so supplemented.

                  3. Notify the Holders of Registrable Securities to be sold,
their Special Counsel and any Managing Underwriters immediately (and, in the
case of (i)(A) below, not less than five (5) days prior to such filing) and (if
requested by any such Person) confirm such notice in writing no later than 3
Business Days following the day (i)(A) when a Prospectus or any Prospectus
supplement or post-effective amendment to the Registration Statement is proposed
to be filed; (B) when the Commission notifies the Company whether there will be
a "review" of such Registration Statement and whenever the Commission comments
on such Registration Statement; and (C) with respect to the Registration
Statement or any post-effective amendment, when the same has become effective;
(ii) of any request by the Commission or any other Federal or state governmental
authority for amendments or supplements to the Registration Statement or
Prospectus or for additional information; (iii) of the issuance by the
Commission of any stop order suspending the effectiveness of the Registration
Statement covering any or all of the Registrable Securities or the initiation of
any Proceedings for that purpose; (iv) if at any time any of the representations
and warranties of the Company contained in any agreement (including any
underwriting agreement) contemplated hereby ceases to be true and correct in all
material respects; (v) of the receipt by the Company of any notification with
respect to the suspension of the qualification or exemption from qualification
of any of the Registrable Securities for sale in any jurisdiction, or the
initiation or threatening of any Proceeding for such purpose; and (vi) of the
occurrence of any event that makes any statement made in the Registration
Statement or Prospectus or any document incorporated or deemed to be
incorporated therein by reference untrue in any material respect or that
requires any revisions to the Registration Statement, Prospectus or other
documents so that, in the case of the Registration Statement or the Prospectus,
as the case may be, it will not contain any untrue statement of a material fact
or omit to state any material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading.

                  4. Use its best efforts to avoid the issuance of, or, if
issued, obtain the withdrawal of (i) any order suspending the effectiveness of
the Registration Statement or (ii) any suspension of the qualification (or
exemption from qualification) of any of the Registrable Securities for sale in
any jurisdiction, at the earliest practicable moment.

                  5. If requested by any Managing Underwriter or the Holders of
a majority of the Registrable Securities to be sold in connection with an
Underwritten Offering, (i) promptly incorporate in a Prospectus supplement or
post-effective amendment to the Registration Statement such information as such
Managing Underwriters and such Holders reasonably agree should be included
therein and (ii) make all required filings of such Prospectus supplement or such
post-effective amendment as soon as practicable after the Company has received
notification of the matters to be incorporated in such Prospectus supplement or
post-effective amendment; provided, however, that the Company shall not be
required to take any action pursuant to this Section 3(e) that would, in the
opinion of counsel for the Company, violate applicable law.



                                      -7-
   8
                  6. Furnish to each Holder, their Special Counsel and any
Managing Underwriters, without charge, at least one conformed copy of each
Registration Statement and each amendment thereto, including financial
statements and schedules, all documents incorporated or deemed to be
incorporated therein by reference, and all exhibits to the extent requested by
such Person (including those previously furnished or incorporated by reference)
promptly after the filing of such documents with the Commission.

                  7. Promptly deliver to each Holder, their Special Counsel, and
any Underwriters, without charge, as many copies of the Prospectus or
Prospectuses (including each form of prospectus) and each amendment or
supplement thereto as such Persons may reasonably request; and the Company
hereby consents to the use of such Prospectus and each amendment or supplement
thereto by each of the selling Holders and any Underwriters in connection with
the offering and sale of the Registrable Securities covered by such Prospectus
and any amendment or supplement thereto.

                  8. Prior to any public offering of Registrable Securities, use
its best efforts to register or qualify or cooperate with the selling Holders,
any Underwriters and their respective counsel in connection with the
registration or qualification (or exemption from such registration or
qualification) of such Registrable Securities for offer and sale under the
securities or Blue Sky laws of such jurisdictions within the United States as
any Holder or Underwriter requests in writing, to keep each such registration or
qualification (or exemption therefrom) effective during the Effectiveness Period
and to do any and all other acts or things necessary or advisable to enable the
disposition in such jurisdictions of the Registrable Securities covered by a
Registration Statement; provided, however, that the Company shall not be
required to qualify to do business or to file a general consent to service of
process in any jurisdiction.

                  9. Cooperate with the Holders and any Managing Underwriters to
facilitate the timely preparation and delivery of certificates representing
Registrable Securities to be sold, which certificates shall be free of all
restrictive legends, and to enable such Registrable Securities to be in such
denominations and registered in such names as any such Managing Underwriters or
Holders may request at least two Business Days prior to any sale of Registrable
Securities.

                  10. Upon the occurrence of any event contemplated by Section
3(c)(vi), as promptly as practicable, prepare a supplement or amendment,
including a post-effective amendment, to the Registration Statement or a
supplement to the related Prospectus or any document incorporated or deemed to
be incorporated therein by reference, and file any other required document so
that, as thereafter delivered, neither the Registration Statement nor such
Prospectus will contain an untrue statement of a material fact or omit to state
a material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they were made,
not misleading.

                  11. Use its best efforts to cause all Registrable Securities
relating to such Registration Statement to be listed on the Nasdaq National
Market and any other securities exchange, market or over-the-counter bulletin
board, if any, on which similar securities issued by the Company are then
listed.




                                      -8-
   9
                  12. Enter into such agreements (including an underwriting
agreement in form, scope and substance as is customary in Underwritten
Offerings) and take all such other actions in connection therewith (including
those reasonably requested by any Managing Underwriters and the Holders of a
majority of the Registrable Securities being sold) in order to expedite or
facilitate the disposition of such Registrable Securities, and whether or not an
underwriting agreement is entered into, (i) make such representations and
warranties to such Holders and such Underwriters as are customarily made by
issuers to underwriters in underwritten public offerings, and confirm the same
if and when requested; (ii) obtain and deliver copies thereof to each Holder and
the Managing Underwriters, if any, of opinions of counsel to the Company and
updates thereof addressed to each selling Holder and each such Underwriter, in
form, scope and substance reasonably satisfactory to any such Managing
Underwriters and Special Counsel to the selling Holders covering the matters
customarily covered in opinions requested in Underwritten Offerings and such
other matters as may be reasonably requested by such Special Counsel and
Underwriters; (iii) immediately prior to the effectiveness of the Registration
Statement, and, in the case of an Underwritten Offering, at the time of delivery
of any Registrable Securities sold pursuant thereto, obtain and deliver copies
to the Holders and the Managing Underwriters, if any, of "cold comfort" letters
and updates thereof from the independent certified public accountants of the
Company (and, if necessary, any other independent certified public accountants
of any subsidiary of the Company or of any business acquired by the Company for
which financial statements and financial data is, or is required to be, included
in the Registration Statement), addressed to each selling Holder and each of the
Underwriters, if any, in form and substance as are customary in connection with
Underwritten Offerings; (iv) if an underwriting agreement is entered into, the
same shall contain indemnification provisions and procedures no less favorable
to the selling Holders and the Underwriters, if any, than those set forth in
Section 7 (or such other provisions and procedures acceptable to the Managing
Underwriters, if any, and holders of a majority of Registrable Securities
participating in such Underwritten Offering); and (v) deliver such documents and
certificates as may be reasonably requested by the Holders of a majority of the
Registrable Securities being sold, their Special Counsel and any Managing
Underwriters to evidence the continued validity of the representations and
warranties made pursuant to clause 3(l)(i) above and to evidence compliance with
any customary conditions contained in the underwriting agreement or other
agreement entered into by the Company.

                  13. Make available for inspection by the selling Holders, any
representative of such Holders, any Underwriter participating in any disposition
of Registrable Securities, and any attorney or accountant retained by such
selling Holders or Underwriters, at the offices where normally kept, during
reasonable business hours, all financial and other records, pertinent corporate
documents and properties of the Company and its subsidiaries, and cause the
officers, directors, agents and employees of the Company and its subsidiaries to
supply all information in each case requested by any such Holder,
representative, Underwriter, attorney or accountant in connection with the
Registration Statement; provided, however, that any information that is
determined in good faith by the Company in writing to be of a confidential
nature at the time of delivery of such information shall be kept confidential by
such Persons, unless (i) disclosure of such information is required by court or
administrative order or is necessary to respond to inquiries of regulatory
authorities; (ii) disclosure of such information, in the opinion of counsel to
such Person, is required by law; (iii) such information becomes generally
available to the public other than as a result of a disclosure or failure to
safeguard by such Person; or (iv) such information becomes available to such
Person from a source other



                                      -9-
   10
than the Company and such source is not known by such Person to be bound by a
confidentiality agreement with the Company.

                  14. Comply with all applicable rules and regulations of the
Commission and make generally available to its security holders earning
statements satisfying the provisions of Section 11(a) of the Securities Act and
Rule 158 not later than 45 days after the end of any 12-month period (or 90 days
after the end of any 12-month period if such period is a fiscal year) (i)
commencing at the end of any fiscal quarter in which Registrable Securities are
sold to Underwriters in a firm commitment or best efforts Underwritten Offering
and (ii) if not sold to Underwriters in such an offering, commencing on the
first day of the first fiscal quarter of the Company after the effective date of
the Registration Statement, which statement shall cover said 12-month period, or
end shorter periods as is consistent with the requirements of Rule 158.

                  15. Provide a CUSIP number for all Registrable Securities, not
later than the effective date of the Registration Statement.

                  The Company may require each selling Holder to furnish to the
Company such information regarding the distribution of such Registrable
Securities as is required by law to be disclosed in the Registration Statement
and the Company may exclude from such registration the Registrable Securities of
any such Holder who unreasonably fails to furnish such information within a
reasonable time after receiving such request.

                  If the Registration Statement refers to any Holder by name or
otherwise as the holder of any securities of the Company, then such Holder shall
have the right to require (i) the inclusion therein of language, in form and
substance reasonably satisfactory to such Holder, to the effect that the
ownership by such Holder of such securities is not to be construed as a
recommendation by such Holder of the investment quality of the Company's
securities covered thereby and that such ownership does not imply that such
Holder will assist in meeting any future financial requirements of the Company,
or (ii) if such reference to such Holder by name or otherwise is not required by
the Securities Act or any similar Federal statute then in force, the deletion of
the reference to such Holder in any amendment or supplement to the Registration
Statement filed or prepared subsequent to the time that such reference ceases to
be required.

                  The Purchaser covenants and agrees that (i) it will not offer
or sell any Registrable Securities under the Registration Statement until it has
received copies of the Prospectus as then amended or supplemented as
contemplated in Section 3(g) and notice from the Company that such Registration
Statement and any post-effective amendments thereto have become effective as
contemplated by Section 3(c) and (ii) the Purchaser and its officers, directors
or Affiliates, if any, will comply with the prospectus delivery requirements of
the Securities Act as applicable to them in connection with sales of Registrable
Securities pursuant to the Registration Statement.

                  Each Holder agrees by its acquisition of such Registrable
Securities that, upon receipt of a notice from the Company of the occurrence of
any event of the kind described in Section 3(c)(ii), 3(c)(iii), 3(c)(iv),
3(c)(v) or 3(c)(vi), such Holder will forthwith discontinue disposition of such
Registrable Securities until such Holder's receipt of the copies of the
supplemented Prospectus and/or amended Registration Statement contemplated by
Section 3(j),



                                      -10-
   11
or until it is advised in writing (the "Advice") by the Company that the use of
the applicable Prospectus may be resumed, and, in either case, has received
copies of any additional or supplemental filings that are incorporated or deemed
to be incorporated by reference in such Prospectus or Registration Statement.

                  XVII Liquidated Damages. The Company acknowledges and agrees
that the Holders will suffer damages, and that it would not be feasible to
ascertain the extent of such damages with precision, if (a) a Registration
Statement shall not have been filed with the Commission on or prior to the
applicable Filing Date, or (b) the Company fails to file with the Commission a
request for acceleration in accordance with Rule 12d1-2 promulgated under the
Securities Exchange Act of 1934, as amended, within five (5) days of the date
that the Company is notified (orally or in writing, whichever is earlier) by the
Commission that an Underlying Securities Registration Statement will not be
"reviewed" or is not subject to further review or comment, or (c) a Registration
Statement is not declared effective by the Commission on or prior to the
applicable Effectiveness Date, or (d) a Registration Statement is filed with and
declared effective by the Commission but thereafter ceases to be effective at
any time prior to the expiration of the Effectiveness Period without being
succeeded within 10 Business Days by a subsequent Registration Statement filed
with and declared effective by the Commission, or (e) trading in the Common
Stock shall be suspended for any reason for more than three Trading Days (as
such term is defined under the Certificate of Vote of Directors Establishing A
Series Of A Class Of Stock filed with the State of Massachusetts in respect of
the Preferred Stock (the "Certificate of Vote")) or (f) if the conversion rights
of the holders of the Preferred Stock as set forth in the Certificate of Vote
are suspended for any reason (any such failure being referred to as an "Event,"
and for purposes of clauses (a), (c) and (f) the date on which such Event
occurs, or, for purposes of clause (b) the date on which such five (5) day
period is exceeded, or for purposes of clause (d) the date which such 10
Business Day-period is exceeded, or for purposes of clause (e) the date on which
such three Trading Day period is exceeded, being referred to as "Event Date"),
then the Company shall pay the Purchaser in cash, as liquidated damages and not
as a penalty, 1.5% of the Purchase Price per month, payment thereof due on the
day after such Event Date and thereafter on each monthly anniversary date of
such Event Date, until such time as a subsequent Registration Statement is
declared effective by the Commission, or until any Event contemplated by clause
(e) or (f), as the case may be, is cured.

                  The Company shall notify each Holder within five days of each
Event and Event Date. The Company shall pay the liquidated damages due with
respect to the Registrable Securities to each Holder of record as at the Event
Date on a monthly basis, beginning with the date upon which such liquidated
damages first accrue.

      XVIII       Registration Expenses

                  1. All fees and expenses incident to the performance of or
compliance with this Agreement by the Company shall be borne by the Company
whether or not the Registration Statement is filed or becomes effective and
whether or not any Registrable Securities are sold pursuant to the Registration
Statement. The fees and expenses referred to in the foregoing sentence shall
include, without limitation, (i) all registration and filing fees (including,
without limitation, fees and expenses (A) with respect to filings required to be
made with the National Association of Securities Dealers, Inc. and (B) in
compliance with state securities or Blue Sky laws (including, without
limitation, fees and disbursements of



                                      -11-
   12




counsel for the Underwriters or Holders in connection with Blue Sky
qualifications of the Registrable Securities and determination of the
eligibility of the Registrable Securities for investment under the laws of such
jurisdictions as the Managing Underwriters, if any, or Holders of a majority of
Registrable Securities may designate)), (ii) printing expenses (including,
without limitation, expenses of printing certificates for Registrable Securities
and of printing prospectuses if the printing of prospectuses is requested by the
Managing Underwriters, if any, or by the holders of a majority of the
Registrable Securities included in the Registration Statement), (iii) messenger,
telephone and delivery expenses, (iv) reasonable fees and disbursements of
counsel for the Company and Special Counsel for the Holders, (v) fees and
disbursements of all independent certified public accountants referred to in
Section 3(l)(iii) (including, without limitation, the expenses of any special
audit and "cold comfort" letters required by or incident to such performance),
(vi) Securities Act liability insurance, if the Company so desires such
insurance, and (vii) fees and expenses of all other Persons retained by the
Company in connection with the consummation of the transactions contemplated by
this Agreement. In addition, the Company shall be responsible for all of its
internal expenses incurred in connection with the consummation of the
transactions contemplated by this Agreement (including, without limitation, all
salaries and expenses of its officers and employees performing legal or
accounting duties), the expense of any annual audit, the fees and expenses
incurred in connection with the listing of the Registrable Securities on any
securities exchange on which similar securities issued by the Company are then
listed.

                  2. In connection with the Registration Statement, the Company
shall reimburse the Holders for the fees and disbursements of one firm of
attorneys chosen by the Holders of a majority of the Registrable Securities.

      XIX         Indemnification

                  1. Indemnification by the Company. The Company shall,
notwithstanding termination of this Agreement and without limitation as to time,
indemnify and hold harmless each Holder, the officers, directors, agents
(including any Underwriters retained by such Holder in connection with the offer
and sale of Registrable Securities), brokers (including brokers who offer and
sell Registrable Securities as principal as a result of a pledge or any failure
to perform under a margin call of Common Stock), investment advisors and
employees of each of them, each Person who controls any such Holder (within the
meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act)
and the officers, directors, agents and employees of each such controlling
Person, to the fullest extent permitted by applicable law, from and against any
and all losses, claims, damages, liabilities, costs (including, without
limitation, costs of preparation and reasonable attorneys' fees) and expenses
(collectively, "Losses"), as incurred, arising out of or relating to any untrue
or alleged untrue statement of a material fact contained in the Registration
Statement, any Prospectus or any form of prospectus or in any amendment or
supplement thereto or in any preliminary prospectus, or arising out of or
relating to any omission or alleged omission of a material fact required to be
stated therein or necessary to make the statements therein (in the case of any
Prospectus or form of prospectus or supplement thereto, in light of the
circumstances under which they were made) not misleading, except to the extent,
but only to the extent, that such untrue statements or omissions are based
solely upon information regarding such Holder furnished in writing to the
Company by or on behalf of such Holder expressly for use therein, which
information was reasonably relied on by the Company for use therein or to the
extent that such information relates to such Holder or such Holder's proposed
method of distribution of Registrable



                                      -12-
   13




Securities and was reviewed and expressly approved in writing by such Holder
expressly for use in the Registration Statement, such Prospectus or such form of
Prospectus or in any amendment or supplement thereto. The Company shall notify
the Holders promptly of the institution, threat or assertion of any Proceeding
of which the Company is aware in connection with the transactions contemplated
by this Agreement.

                  2. Indemnification by Holders. In connection with the
Registration Statement, each Holder shall furnish to the Company in writing such
information as the Company reasonably requests for use in connection with the
Registration Statement or any Prospectus and agrees, severally and not jointly,
to indemnify and hold harmless the Company, their directors, officers, agents
and employees, each Person who controls the Company (within the meaning of
Section 15 of the Securities Act and Section 20 of the Exchange Act), and the
directors, officers, agents or employees of such controlling Persons, to the
fullest extent permitted by applicable law, from and against all Losses (as
determined by a court of competent jurisdiction in a final judgment not subject
to appeal or review) arising solely out of or based solely upon any untrue
statement of a material fact contained in the Registration Statement, any
Prospectus, or any form of prospectus, or arising solely out of or based solely
upon any omission of a material fact required to be stated therein or necessary
to make the statements therein not misleading to the extent, but only to the
extent, that such untrue statement or omission is contained in any information
so furnished in writing by such Holder to the Company specifically for inclusion
in the Registration Statement or such Prospectus and that such information was
reasonably relied upon by the Company for use in the Registration Statement,
such Prospectus or such form of prospectus or to the extent that such
information relates to such Holder or such Holder's proposed method of
distribution of Registrable Securities and was reviewed and expressly approved
in writing by such Holder expressly for use in the Registration Statement, such
Prospectus or such form of Prospectus. In no event shall the liability of any
selling Holder hereunder be greater in amount than the dollar amount of the net
proceeds received by such Holder upon the sale of the Registrable Securities
giving rise to such indemnification obligation.

                  3. Conduct of Indemnification Proceedings. If any Proceeding
shall be brought or asserted against any Person entitled to indemnity hereunder
(an "Indemnified Party"), such Indemnified Party promptly shall notify the
Person from whom indemnity is sought (the "Indemnifying Party") in writing, and
the Indemnifying Party shall assume the defense thereof, including the
employment of counsel reasonably satisfactory to the Indemnified Party and the
payment of all fees and expenses incurred in connection with defense thereof;
provided, that the failure of any Indemnified Party to give such notice shall
not relieve the Indemnifying Party of its obligations or liabilities pursuant to
this Agreement, except (and only) to the extent that it shall be finally
determined by a court of competent jurisdiction (which determination is not
subject to appeal or further review) that such failure shall have proximately
and materially adversely prejudiced the Indemnifying Party.

                  An Indemnified Party shall have the right to employ separate
counsel in any such Proceeding and to participate in the defense thereof, but
the fees and expenses of such counsel shall be at the expense of such
Indemnified Party or Parties unless: (1) the Indemnifying Party has agreed to
pay such fees and expenses; or (2) the Indemnifying Party shall have failed
promptly to assume the defense of such Proceeding and to employ counsel
reasonably satisfactory to such Indemnified Party in any such Proceeding; or (3)
the named parties to any such Proceeding (including any impleaded parties)
include both such



                                      -13-
   14




Indemnified Party and the Indemnifying Party, and such Indemnified Party shall
have been advised by counsel that a conflict of interest is likely to exist if
the same counsel were to represent such Indemnified Party and the Indemnifying
Party (in which case, if such Indemnified Party notifies the Indemnifying Party
in writing that it elects to employ separate counsel at the expense of the
Indemnifying Party, the Indemnifying Party shall not have the right to assume
the defense thereof and such counsel shall be at the expense of the Indemnifying
Party). The Indemnifying Party shall not be liable for any settlement of any
such Proceeding effected without its written consent, which consent shall not be
unreasonably withheld. No Indemnifying Party shall, without the prior written
consent of the Indemnified Party, effect any settlement of any pending
Proceeding in respect of which any Indemnified Party is a party, unless such
settlement includes an unconditional release of such Indemnified Party from all
liability on claims that are the subject matter of such Proceeding.

                  All fees and expenses of the Indemnified Party (including
reasonable fees and expenses to the extent incurred in connection with
investigating or preparing to defend such Proceeding in a manner not
inconsistent with this Section) shall be paid to the Indemnified Party, as
incurred, within 10 Business Days of written notice thereof to the Indemnifying
Party (regardless of whether it is ultimately determined that an Indemnified
Party is not entitled to indemnification hereunder; provided, that the
Indemnifying Party may require such Indemnified Party to undertake to reimburse
all such fees and expenses to the extent it is finally judicially determined
that such Indemnified Party is not entitled to indemnification hereunder).

                  4. Contribution. If a claim for indemnification under Section
6(a) or 6(b) is unavailable to an Indemnified Party or is insufficient to hold
such Indemnified Party harmless for any Losses in respect of which this Section
would apply by its terms (other than by reason of exceptions provided in this
Section), then each Indemnifying Party, in lieu of indemnifying such Indemnified
Party, shall contribute to the amount paid or payable by such Indemnified Party
as a result of such Losses, in such proportion as is appropriate to reflect the
relative fault of the Indemnifying Party and Indemnified Party in connection
with the actions, statements or omissions that resulted in such Losses as well
as any other relevant equitable considerations. The relative fault of such
Indemnifying Party and Indemnified Party shall be determined by reference to,
among other things, whether any action in question, including any untrue or
alleged untrue statement of a material fact or omission or alleged omission of a
material fact, has been taken or made by, or relates to information supplied by,
such Indemnifying Party or Indemnified Party, and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
action, statement or omission. The amount paid or payable by a party as a result
of any Losses shall be deemed to include, subject to the limitations set forth
in Section 6(c), any attorneys' or other fees or expenses incurred by such party
in connection with any Proceeding to the extent such party would have been
indemnified for such fees or expenses if the indemnification provided for in
this Section was available to such party.

                  The parties hereto agree that it would not be just and
equitable if contribution pursuant to this Section 6(d) were determined by pro
rata allocation or by any other method of allocation that does not take into
account the equitable considerations referred to in the immediately preceding
paragraph. Notwithstanding the provisions of this Section 6(d), the Purchaser
shall not be required to contribute, in the aggregate, any amount in excess of
the amount by which the proceeds actually received by the Purchaser from the
sale of the



                                      -14-
   15




Registrable Securities subject to the Proceeding exceeds the amount of any
damages that the Purchaser has otherwise been required to pay by reason of such
untrue or alleged untrue statement or omission or alleged omission. No Person
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the Securities Act) shall be entitled to contribution from any Person who was
not guilty of such fraudulent misrepresentation.

                  The indemnity and contribution agreements contained in this
Section are in addition to any liability that the Indemnifying Parties may have
to the Indemnified Parties.

      XX          Rule 144

                  The Company shall file the reports required to be filed by it
under the Securities Act and the Exchange Act in a timely manner and, if at any
time the Company is not required to file such reports, they will, upon the
request of any Holder, make publicly available other information so long as
necessary to permit sales of its securities pursuant to Rule 144. The Company
further covenants that it will take such further action as any Holder may
reasonably request, all to the extent required from time to time to enable such
Holder to sell Registrable Securities without registration under the Securities
Act within the limitation of the exemptions provided by Rule 144. Upon the
request of any Holder, the Company shall deliver to such Holder a written
certification of a duly authorized officer as to whether it has complied with
such requirements.

      XXI         Miscellaneous

                  1. Remedies. In the event of a breach by the Company or by a
Holder, of any of their obligations under this Agreement, each Holder or the
Company, as the case may be, in addition to being entitled to exercise all
rights granted by law and under this Agreement, including recovery of damages,
will be entitled to specific performance of its rights under this Agreement. The
Company and each Holder agree that monetary damages would not provide adequate
compensation for any losses incurred by reason of a breach by it of any of the
provisions of this Agreement and hereby further agrees that, in the event of any
action for specific performance in respect of such breach, it shall waive the
defense that a remedy at law would be adequate.

                  2. No Inconsistent Agreements. Except as set forth in Schedule
8 hereto, neither the Company nor any of its subsidiaries has, as of the date
hereof, nor shall the Company or any of its subsidiaries, on or after the date
of this Agreement, enter into any agreement with respect to its securities that
is inconsistent with the rights granted to the Holders in this Agreement or
otherwise conflicts with the provisions hereof. Neither the Company nor any of
its subsidiaries has previously entered into any agreement granting any
registration rights with respect to any of its securities to any Person. Without
limiting the generality of the foregoing, without the written consent of the
Holders of a majority of the then outstanding Registrable Securities, the
Company shall not grant to any Person the right to request the Company to
register any securities of the Company under the Securities Act unless the
rights so granted are subject in all respects to the prior rights in full of the
Holders set forth herein, and are not otherwise in conflict or inconsistent with
the provisions of this Agreement.

                  3. No Piggyback on Registrations. Except as set forth in
Schedule 8 hereto, neither of the Company nor any of its security holders (other
than the Holders in such



                                      -15-
   16
capacity pursuant hereto) may include securities of the Company in the
Registration Statement other than the Common Stock to be issued under the
Purchase Agreement, and the Company shall not enter into any agreement providing
any such right to any of its securityholders.

                  4. Piggy-Back Registrations. If at any time the Company shall
determine to prepare and file with the Commission a registration statement
relating to an offering for its own account or the account of others under the
Securities Act of any of its equity securities, other than on Form S-4 or Form
S-8 (each as promulgated under the Securities Act) or their then equivalents
relating to equity securities to be issued solely in connection with any
acquisition of any entity or business or equity securities issuable in
connection with stock option or other employee benefit plans, the Company shall
send to each holder of Registrable Securities written notice of such
determination and, if within twenty (20) days after receipt of such notice, any
such holder shall so request in writing, the Company shall include in such
registration statement all or any part of the Registrable Securities such holder
requests to be registered, except that if, in connection with any Underwritten
Offering for the account of the Company the managing underwriter(s) thereof
shall impose a limitation on the number of shares of Common Stock which may be
included in the registration statement because, in such underwriter(s)'
judgment, such limitation is necessary to effect an orderly public distribution
of securities covered thereby, then the Company shall be obligated to include in
such registration statement only such limited portion of the Registrable
Securities for to which such holder has requested inclusion hereunder. Any
exclusion of Registrable Securities shall be made pro rata among the holders
seeking to include Registrable Securities, in proportion to the number of
Registrable Securities sought to be included by such holders; provided, however,
that the Company shall not exclude any Registrable Securities unless the Company
has first excluded all outstanding securities the holders of which are not
entitled by right to inclusion of securities in such registration statement; and
provided, further, however, that, after giving effect to the immediately
preceding proviso, any exclusion of Registrable Securities shall be made pro
rata with holders of other securities having the right to include such
securities in such registration statement. No right to registration of
Registrable Securities under this Section shall be construed to limit any
registration otherwise required hereunder. This Section 8(d) shall apply only at
such times when all of the Registrable Securities issued and outstanding cannot
be sold pursuant to an effective Registration Statement on Form S-3 and for a
period not to exceed two years after the date of this Agreement.

                  5. Amendments and Waivers. The provisions of this Agreement,
including the provisions of this sentence, may not be amended, modified or
supplemented, and waivers or consents to departures from the provisions hereof
may not be given, unless the same shall be in writing and signed by the Company
and the Holders of at least a majority of the then outstanding Registrable
Securities; provided, however, that, for the purposes of this sentence,
Registrable Securities that are owned, directly or indirectly, by the Company,
or an Affiliate of the Company are not deemed outstanding. Notwithstanding the
foregoing, a waiver or consent to depart from the provisions hereof with respect
to a matter that relates exclusively to the rights of Holders and that does not
directly or indirectly affect the rights of other Holders may be given by
Holders of at least a majority of the Registrable Securities to which such
waiver or consent relates; provided, however, that the provisions of this
sentence may not be amended, modified, or supplemented except in accordance with
the provisions of the immediately preceding sentence.




                                      -16-
   17




                  6. Notices. Any and all notices or other communications or
deliveries required or permitted to be provided hereunder shall be in writing
and shall be deemed given and effective on the earliest of (i) the date of
transmission, if such notice or communication is delivered via facsimile at the
facsimile telephone number specified in this Section prior to 4:30 p.m. (Eastern
Time) on a Business Day, (ii) the Business Day after the date of transmission,
if such notice or communication is delivered via facsimile at the facsimile
telephone number specified in the Purchase Agreement later than 4:30 p.m.
(Eastern Time) on any date and earlier than 11:59 p.m. (Eastern Time) on such
date, (iii) the Business Day following the date of mailing, if sent by
nationally recognized overnight courier service, or (iv) upon actual receipt by
the party to whom such notice is required to be given. The address for such
communications shall be:



                  If to the Company:        Cayenne Software, Inc.
                                            8 New England Executive Park
                                            Burlington, MA  01803
                                            Facsimile No.: (617) 229-8124
                                            Attention: Eugene J. DiDonato

                  With copies to:           Foley, Hoag & Eliot
                                            One Post Office Square
                                            Boston, MA 02109
                                            Facsimile No.: (617) 832-7000
                                            Attention: David W. Walker


                  If to the Purchaser:      Southbrook International
                                             Investments, Ltd.
                                            c/o Trippoak Advisors, Inc.
                                            630 Fifth Avenue
                                            Suite 2000
                                            New York, New York  10111
                                            Facsimile No.:  (212) 332-3256
                                            Attention: Robert L. Miller

                  with copies to:           Brown Simpson, L.L.C.
                                            Carnegie Hall Tower
                                            152 West 57th Street, 40th Floor
                                            New York, New York  10019
                                            Facsimile No.: (212) 247-1329
                                            Attn: James R. Simpson

                                                          - and -

                                            Robinson Silverman Pearce Aronsohn
                                              & Berman LLP
                                            1290 Avenue of the Americas
                                            New York, NY 10104
                                            Facsimile No.: (212) 541-4630



                                      -17-
   18
                               Attn: Eric L. Cohen

                  If to any other Person who is then the registered Holder:

                        To the address of such Holder as it appears in the stock
                        transfer books of the Company

or such other address as may be designated in writing hereafter, in the same
manner, by such Person.

                  7. Successors and Assigns. This Agreement shall inure to the
benefit of and be binding upon the successors and permitted assigns of each of
the parties and shall inure to the benefit of each Holder. The Company may not
assign its rights or obligations hereunder without the prior written consent of
each Holder. A Holder may assign its rights hereunder in the manner and to the
Persons as permitted under the Purchase Agreement.

                  8. Assignment of Registration Rights. The rights of the
Purchaser hereunder, including the right to have the Company register for resale
Registrable Securities in accordance with the terms of this Agreement, shall be
automatically assignable by the Purchaser to any assignee or transferee of all
or a portion of the shares of Preferred Stock, the Warrants or the Registrable
Securities if: (i) the Purchaser agrees in writing with the transferee or
assignee to assign such rights, and a copy of such agreement is furnished to the
Company within a reasonable time after such assignment, (ii) the Company is,
within a reasonable time after such transfer or assignment, furnished with
written notice of (a) the name and address of such transferee or assignee, and
(b) the securities with respect to such registration rights are being
transferred or assigned, (iii) following such transfer or assignment the further
disposition of such securities by the transferee or assignees restricted under
the Securities Act and applicable state securities laws, (iv) at or before the
time the Company receives the written notice contemplated by clause (ii) of this
Section, the transferee or assignee agrees in writing with the Company to be
bound by all of the provisions of this Agreement, and (v) such transfer shall
have been made in accordance with the applicable requirements of the Purchase
Agreement. The rights to assignment shall apply to the Purchaser's (and to
subsequent) successors and assigns.

                  9. Counterparts. This Agreement may be executed in any number
of counterparts, each of which when so executed shall be deemed to be an
original and, all of which taken together shall constitute one and the same
Agreement. In the event that any signature is delivered by facsimile
transmission, such signature shall create a valid binding obligation of the
party executing (or on whose behalf such signature is executed) the same with
the same force and effect as if such facsimile signature were the original
thereof.

                  10. Governing Law; Arbitration;. (A) This Agreement shall be
governed by and construed and enforced in accordance with the internal laws of
the State of New York, without regard to principles of conflicts of law thereof.

                           (B) All disputes between the parties hereto arising 
under the terms of this Agreement shall be arbitrated in New York City under the
rules of the American Arbitration Association then in effect in the City of New
York. Judgment on any award made by the arbitrators hereunder may be rendered in
any court having jurisdiction. The parties consent to



                                      -18-
   19




the nonexclusive jurisdiction of the Federal and State Courts sitting in New
York County, New York, in connection with the enforcement of such award. The
parties agree to keep confidential any materials, documents or other information
that is disclosed in connection with any arbitration proceeding.

                  11. Cumulative Remedies. The remedies provided herein are
cumulative and not exclusive of any remedies provided by law.

                  12. Severability. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction to be
invalid, illegal, void or unenforceable, the remainder of the terms, provisions,
covenants and restrictions set forth herein shall remain in full force and
effect and shall in no way be affected, impaired or invalidated, and the parties
hereto shall use their reasonable efforts to find and employ an alternative
means to achieve the same or substantially the same result as that contemplated
by such term, provision, covenant or restriction. It is hereby stipulated and
declared to be the intention of the parties that they would have executed the
remaining terms, provisions, covenants and restrictions without including any
of such that may be hereafter declared invalid, illegal, void or unenforceable.

                  13. Headings. The headings in this Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

                  14. Shares Held by The Company and its Affiliates. Whenever
the consent or approval of Holders of a specified percentage of Registrable
Securities is required hereunder, Registrable Securities held by the Company or
its Affiliates (other than the Purchaser or transferees or successors or assigns
thereof if such Persons are deemed to be Affiliates solely by reason of their
holdings of such Registrable Securities) shall not be counted in determining
whether such consent or approval was given by the Holders of such required
percentage.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                            [SIGNATURE PAGE FOLLOWS]



                                      -19-
   20
                  IN WITNESS WHEREOF, the parties have executed this Agreement
as of the date first written above.

                                            CAYENNE SOFTWARE, INC.



                                            By:______________________
                                               Name:
                                               Title:



                                            SOUTHBROOK INTERNATIONAL
                                            INVESTMENTS, LTD.


                                            By:______________________
                                               Name:
                                               Title:




                                      -20-