<Page>


      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 10, 2001
                                                     REGISTRATION NO. 333-64976

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                           --------------------------

                            POST-EFFECTIVE AMENDMENT
                                    NO. 1 TO
                                    FORM S-1
                                       ON
                                    FORM S-3

                             REGISTRATION STATEMENT

                                      UNDER

                           THE SECURITIES ACT OF 1933
                           --------------------------

                                  I-MANY, INC.
             (Exact name of Registrant as specified in its charter)

<Table>
                                                            
           DELAWARE                        7389                      01-0524931
(State or other jurisdiction      (Primary Standard Industrial      (I.R.S. Employer
of incorporation or organization)  Classification Code Number)    Identification Number)
</Table>


                               537 CONGRESS STREET
                                   5(TH) FLOOR
                           PORTLAND, MAINE 04101-3353
                                 (207) 774-3244
   (Address Including Zip Code, and Telephone Number, Including Area Code, of
                    Registrant's Principal Executive Offices)

                                 A. LEIGH POWELL
                      PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                  I-MANY, INC.
                               537 CONGRESS STREET
                                   5(TH) FLOOR
                           PORTLAND, MAINE 04101-3353
                                 (207) 774-3244
             (Name, Address Including Zip Code and Telephone Number,
                   Including Area Code, of Agent for Service)

                           --------------------------

                                    COPY TO:

                             JEFFREY A. STEIN, ESQ.
                                HALE AND DORR LLP
                                 60 STATE STREET
                                BOSTON, MA 02109
                            TELEPHONE: (617) 526-6000
                            TELECOPY: (617) 526-5000

                           --------------------------

APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date hereof.

                           --------------------------

       If any of the securities being registered on this Form are to be offered
on a delayed or continuous basis pursuant to Rule 415 under the Securities Act,
check the following box. /X/

       If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. / /
<Page>

       If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration number of the earlier effective registration statement for the same
offering. / /

       If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration number of the earlier effective registration statement for the same
offering. / /

       If delivery of the Prospectus is expected to be made pursuant to Rule
434, please check the following box. / /

                           --------------------------

                         CALCULATION OF REGISTRATION FEE

<Table>
<Caption>
==================================================================================================================
                                                       PROPOSED            PROPOSED
                                         AMOUNT        MAXIMUM             MAXIMUM               AMOUNT OF
                                         TO BE         OFFERING PRICE      AGGREGATE             REGISTRATION
TITLE OF SHARES TO BE REGISTERED         REGISTERED    PER SHARE (1)       OFFERING PRICE (1)    FEE (2)
- ------------------------------------------------------------------------------------------------------------------
                                                                                     
Common Stock, $0.0001 par value per
Share .................................  196,228       $5.52               $1,083,178.56         $270.79
==================================================================================================================
</Table>

(1) Estimated solely for purposes of calculating the registration fee pursuant
to Rule 457(c) under the Securities Act and based upon the average of the high
and low prices on the Nasdaq National Market on August 3, 2001.

(2) A registration fee of $372.34 was paid in connection with the filing of this
Registration Statement on Form S-1 on July 12, 2001. Therefore, no further fee
is required.

       This Post-Effective Amendment to Form S-1 on Form S-3 is being filed
pursuant to Rule 401(c) under the Securities Act of 1933, as amended, in order
to convert the Registration Statement of Form S-1 (Commission File No.
333-64976) to a Form S-3. The prospectus contained in the Form S-3 supersedes
the prospectus contained in the Form S-1.

       THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.

================================================================================
<Page>

THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. THE
SELLING STOCKHOLDERS NAMED IN THIS PROSPECTUS MAY NOT SELL THESE SECURITIES
UNTIL THE REGISTRATION STATEMENT FILED WITH THE SECURITIES AND EXCHANGE
COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER TO SELL SECURITIES, AND
NEITHER WE NOR THE SELLING STOCKHOLDERS NAMED IN THIS PROSPECTUS ARE SOLICITING
OFFERS TO BUY THESE SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT
PERMITTED.
<Page>

                  SUBJECT TO COMPLETION, DATED AUGUST 10, 2001.



                                  I-MANY, INC.

                          196,228 SHARES OF COMMON STOCK

       This prospectus relates to resales of shares of our common stock issued
by us to the former stockholders of Chi-Cor Information Management, Inc. and
Intersoft International, Inc., in connection with our acquisitions of those
companies.


       We will not receive any proceeds from the sale of the shares.

       The selling stockholders identified in this prospectus, or their
pledgees, donees, transferees or other successors-in-interest, may offer the
shares from time to time through public or private transactions at prevailing
market prices, at prices related to prevailing market prices or at privately
negotiated prices.

       We do not know when or in what amounts a selling stockholder may offer
shares for sale. The selling stockholders may decide to not sell any or all
of the shares offered by this prospectus.

       Our common stock is traded on the Nasdaq National Market under the
symbol "IMNY." On August 9, 2001, the closing sale price of the common stock
on Nasdaq was $5.46 per share. You are urged to obtain current market
quotations for the common stock.

                      -------------------------------------


       INVESTING IN OUR COMMON STOCK INVOLVES A HIGH DEGREE OF RISK. SEE "RISK
FACTORS" BEGINNING ON PAGE 2.


                     --------------------------------------


       THE SECURITIES AND EXCHANGE COMMISSION AND STATE SECURITIES REGULATORS
HAVE NOT APPROVED OR DISAPPROVED THESE SECURITIES, OR DETERMINED IF THIS
PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

                            ------------------------


                The date of this prospectus is            , 2001.
<Page>

       YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED IN THIS PROSPECTUS. WE
HAVE NOT AUTHORIZED ANYONE TO PROVIDE YOU WITH INFORMATION DIFFERENT FROM THAT
CONTAINED IN THIS PROSPECTUS. THE SELLING STOCKHOLDERS ARE OFFERING TO SELL, AND
SEEKING OFFERS TO BUY, SHARES OF COMMON STOCK ONLY IN JURISDICTIONS WHERE OFFERS
AND SALES ARE PERMITTED. THE INFORMATION CONTAINED IN THIS PROSPECTUS IS
ACCURATE ONLY AS OF THE DATE OF THIS PROSPECTUS, REGARDLESS OF THE TIME OF
DELIVERY OF THIS PROSPECTUS OR OF ANY SALE OF OUR COMMON STOCK. IN THIS
PROSPECTUS, "I-MANY," "WE," "US" AND "OUR" REFER TO I-MANY, INC., A DELAWARE
CORPORATION.

                            ------------------------


                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                              PAGE

                                                                            --------
                                                                            
The Company ..............................................................      1
Risk Factors .............................................................      2
Cautionary Note Regarding Forward-Looking Statements .....................      6
Use of Proceeds ..........................................................      7
Selling Stockholders .....................................................      7
Dilution .................................................................      9
Plan of Distribution .....................................................     10
Legal Matters ............................................................     11
Experts ..................................................................     11
Where You Can Find More Information ......................................     11
Incorporation of Certain Documents by Reference ..........................     12
</Table>


                            ------------------------

       We own or have rights to tradenames and trademarks that we use in
connection with the sale of our products and services. We own the U.S.
registered trademark CARS-Registered Trademark-, which is an acronym for our
Contract Administration and Reporting System, and the U.S. registered
trademark "I-many." "CARS/Medicaid," CARS/Analytics" and "I-many.com" are
also our trademarks. All other trademarks and service marks referenced in
this prospectus are the property of their respective owners.

                                       i
<Page>

                                   THE COMPANY

       Our principal executive offices are located at 537 Congress Street,
Portland, Maine 04101. Our telephone number at that address is (207) 774-3244.
Our primary sales and marketing office is located in Edison, New Jersey. Our
website is located at WWW.IMANYINC.COM. The information contained on our website
is not part of this prospectus.


                                       1
<Page>

                                  RISK FACTORS

         ANY INVESTMENT IN OUR SHARES OF COMMON STOCK INVOLVES A HIGH DEGREE OF
RISK. YOU SHOULD CONSIDER CAREFULLY THE FOLLOWING INFORMATION ABOUT THESE
RISKS,TOGETHER WITH THE OTHER INFORMATION IN THIS PROSPECTUS, BEFORE YOU DECIDE
TO BUY OUR COMMON STOCK. IF ANY OF THE FOLLOWING RISKS ACTUALLY OCCUR, OUR
BUSINESS, RESULTS OF OPERATIONS AND FINANCIAL CONDITION WOULD LIKELY SUFFER. IN
THESE CIRCUMSTANCES, THE MARKET PRICE OF OUR COMMON STOCK COULD DECLINE, AND YOU
MAY LOSE ALL OR PART OF THE MONEY YOU PAID TO BUY OUR COMMON STOCK.

         WE HAVE INCURRED SUBSTANTIAL LOSSES IN 1999 AND 2000 AND FOR THE SIX
MONTHS ENDED JUNE 30, 2001 AND OUR RETURN TO PROFITABILITY IS UNCERTAIN

         We incurred net losses of approximately $5.2 million in the year ended
December 31, 1999, $24.2 million in the year ended December 31, 2000 and $7.4
million in the six months ended June 30, 2001, and we had an accumulated deficit
at June 30, 2001 of $38.5 million. We expect to continue spending significantly,
principally for sales, marketing and development expenses, and therefore we will
need to grow our revenues significantly before we reach profitability. In
addition, as we announced in our July 2, 2001 press release, our second quarter
results were impacted by a number of factors that deferred purchases from us,
and we cannot assure you that we will not continue to be affected by these
factors. Although we have been profitable in certain years, we cannot assure you
that we will achieve sufficient revenues to become profitable in the future. If
our revenue grows more slowly than we anticipate or if our operating expenses
either increase more than we expect or cannot be reduced in light of lower than
expected revenue, we may not be profitable.

IT IS DIFFICULT FOR US TO PREDICT WHEN OR IF SALES WILL OCCUR AND WE OFTEN INCUR
SIGNIFICANT SELLING EXPENSES IN ADVANCE OF OUR RECOGNITION OF ANY RELATED
REVENUE

         Our clients view the purchase of our software applications and related
professional services as a significant and strategic decision. As a result,
clients carefully evaluate our software products and services. The length of
this evaluation process is affected by factors such as the client's need to
rapidly implement a solution and whether the client is new or is extending an
existing implementation. The license of our software products may also be
subject to delays if the client has lengthy internal budgeting, approval and
evaluation processes which are quite common in the context of introducing large
enterprise-wide tools. We may incur significant selling and marketing expenses
during a client's evaluation period, including the costs of developing a full
proposal and completing a rapid proof of concept or custom demonstration, before
the client places an order with us. Clients may also initially purchase a
limited number of licenses before expanding their implementations. Larger
clients may purchase our software products as part of multiple simultaneous
purchasing decisions, which may result in additional unplanned administrative
processing and other delays in the recognition of our license revenues. If
revenues forecasted from a significant client for a particular quarter are not
realized or are delayed, as occurred in our second quarter 2001, we may
experience an unplanned shortfall in revenues during that quarter. This may
cause our operating results to be below the expectations of public market
analysts or investors, which could cause the value of our common stock to
decline.

OUR METHOD OF ACCOUNTING FOR THE COSTS WE INCURRED IN CONNECTION WITH THE
DEVELOPMENT OF OUR INTERNET PORTAL IS BASED ON OUR BUSINESS MODEL, AND WE MAY
INCUR A CHARGE AGAINST EARNINGS

         In accordance with generally accepted accounting principles, we have
capitalized certain of our costs related to the development of imany.com, our
proprietary Internet portal, and we are amortizing the capitalized costs over an
estimated useful life of twenty-four months. From time to time we evaluate the
value to us of the portal, and in the event that we determine that our portal no
longer has sufficient value to justify the then carrying value of the
capitalized costs, we would be required to write off all, or a portion of, these
capitalized costs. In such an event, our results of operations for the period in
which we take such a charge could be materially adversely affected. We are
considering writing off all or substantially all of the capitalized costs in the
third quarter of 2001.


                                       2
<Page>

WE HAVE TWO MANAGEMENT LOCATIONS AND OTHER FACILITIES AND AS WE CONTINUE TO GROW
WE MAY EXPERIENCE DIFFICULTIES IN OPERATING FROM THESE FACILITIES

         Certain members of our management team are based at our corporate
headquarters located in Portland, Maine, and other members of our management
team are based at our sales office in Edison, New Jersey. In addition, as a
result of our acquisitions, we have added additional facilities, including an
office in London, United Kingdom. As we grow, the geographic distance between
these offices could make it more difficult for our management and other
employees to effectively communicate with each other and, as a result, could
place a significant strain on our managerial, operational and financial
resources. Our total revenue increased from $7.5 million in the year ended
December 31, 1997 to $36.5 million in the year ended December 31, 2000, and to
$28.3 million in the six months ended June 30, 2001, and the number of our
employees increased from 67 as of December 31, 1997 to 402 as of June 30, 2001.
To accommodate this growth, we are implementing new and upgraded operating and
financial systems, procedures and controls. We may not succeed in these efforts.
Our failure to expand and integrate these systems in an efficient manner could
prevent us from successfully implementing our business model. If we continue to
grow, we will need to recruit, train and retain a significant number of
employees, particularly employees with technical, marketing and sales
backgrounds. Because these individuals are in high demand, we may not be able to
attract the staff we need to accommodate our expansion.

WE ARE HIGHLY DEPENDENT UPON THE HEALTHCARE INDUSTRY AND FACTORS WHICH ADVERSELY
AFFECT THAT MARKET COULD ALSO ADVERSELY AFFECT US

         Most of our revenue to date has come from pharmaceutical companies and
a limited number of other clients in the healthcare industry, and our future
growth depends, in large part, upon increased sales to the healthcare market. In
the first six months of 2001, one customer, Premier, Inc., accounted for
approximately 13 percent of our total revenues. As a result, demand for our
solutions could be affected by any factors which could adversely affect the
demand for healthcare products which are purchased and sold pursuant to
contracts managed through our solutions. The financial condition of our clients
and their willingness to pay for our solutions are affected by factors which may
impact the purchase and sale of healthcare products, including competitive
pressures, decreasing operating margins within the industry, currency
fluctuations, active geographic expansion and government regulation. The
healthcare market is undergoing intense consolidation. We cannot assure you that
we will not experience declines in revenue caused by mergers or consolidations
among our clients and potential clients.

OUR EFFORTS TO TARGET MARKETS OTHER THAN THE HEALTHCARE MARKET HAVE NOT YET
RESULTED IN SIGNIFICANT REVENUE, AND WE CANNOT BE SURE THAT OUR INITIATIVES IN
THESE OTHER MARKETS WILL BE SUCCESSFUL

         As part of our growth strategy, we have acquired companies which target
markets other than the healthcare market and have begun initiatives to sell our
CARS software suite of products and services in markets other than the
healthcare market, including the consumer packaged goods, foodservice and other
industries. While we believe that the contractual purchase relationships between
manufacturers and customers in these markets have similar attributes to those in
the healthcare market, we cannot assure you that our assumptions are correct or
that we will be successful in adapting our technology to these other markets.
Although we have entered into strategic relationships with Procter & Gamble and
Accenture LLP, we do not yet know how rapidly or successfully our purchase
contract management software solutions will be implemented in the commercial
products and other industries. In connection with our efforts in other
industries, it may be necessary for us to hire additional personnel with
expertise in these other markets.

OUR BUSINESS MODEL INCLUDES HOSTING OUR SOFTWARE APPLICATIONS ON BEHALF OF OUR
CLIENTS AND MAINTAINING THEIR CRITICAL SALES DATA, AND IF OUR SYSTEMS FAIL OR
THE DATA IS LOST OR CORRUPTED, OUR CLIENTS MAY LOSE CONFIDENCE IN US

         We offer to host our software products on our computers or on computers
hosted on our behalf for access by our clients and we offer to maintain certain
of our clients' critical sales data on our computers or on computers hosted on
our behalf. Fire, floods, earthquakes, power loss, telecommunications failures,
break-ins, human error, computer viruses, intentional acts of vandalism and
similar events could damage these systems and result in loss of customer data or


                                       3
<Page>

a loss in the ability of our clients to access the software we are hosting for
their use. Our clients would lose confidence in us and could stop doing business
with us if our systems were affected by any of these occurrences or if any
client data were lost. Our insurance policies may not adequately compensate us
for any losses that may occur due to any failures or interruptions in our
systems or loss of data.

WE MAY NOT BE SUCCESSFUL IN ACQUIRING NEW TECHNOLOGIES OR BUSINESSES AND THIS
COULD HINDER OUR EXPANSION EFFORTS

         We intend in the future to consider additional acquisitions of or new
investments in complementary businesses, products, services or technologies. We
cannot assure you that we will be able to identify appropriate acquisition or
investment candidates. Even if we do identify suitable candidates, we cannot
assure you that we will be able to make such acquisitions or investments on
commercially acceptable terms. Furthermore, we may incur debt or issue equity
securities to pay for any future acquisitions. The issuance of equity securities
could be dilutive to our existing stockholders.

IF WE DO ACQUIRE NEW TECHNOLOGIES OR BUSINESSES, WE MAY HAVE DIFFICULTY
INTEGRATING THOSE NEW TECHNOLOGIES OR BUSINESSES

         We have acquired Chi-Cor Information Management, Inc., Intersoft
International, Inc. and BCL Vision Ltd., which are located in Chicago, Illinois,
Cleveland, Ohio and London, United Kingdom, respectively, and have entered into
an agreement to acquire Provato, Inc. based in Oakland, California. Any other
company that we acquire is likely to be distant from our headquarters in
Portland, Maine and will have a culture different from ours as well as
technologies, products and services that our employees will need to understand
and integrate with our own. We will have to assimilate those employees,
technologies and products and that effort is difficult, time-consuming and may
be unsuccessful. If we are not successful, our investment in the acquired entity
may be lost, and even if we are successful, the process of integrating an
acquired entity may divert our attention from our core business.

IF WE DO ACQUIRE NEW TECHNOLOGIES OR BUSINESSES, OUR RESULTS OF OPERATIONS MAY
BE ADVERSELY AFFECTED

         In connection with our acquisitions of ChiCor, Vintage Software, Inc.,
Intersoft, and BCL Vision, we have recorded $26.8 million of intangible assets,
the amortization of which will adversely affect our results of operations in
future periods. In addition, we recorded a $1.0 million charge during the second
quarter of 2001 for a write-off of a portion of the purchase price of BCL Vision
as in-process research and development. We expect to record a significant amount
of goodwill and other intangibles assets and a write-off of in-process research
and development in connection with our planned acquisition of Provato, Inc., and
with respect to any future acquisition.

OUR FIXED COSTS HAVE LED, AND MAY CONTINUE TO LEAD, TO FLUCTUATIONS IN OPERATING
RESULTS WHICH HAS RESULTED, AND COULD IN THE FUTURE RESULT, IN A DECLINE OF OUR
STOCK PRICE

         A significant percentage of our expenses, particularly personnel costs
and rent, are fixed costs and are based in part on expectations of future
revenues. We may be unable to reduce spending in a timely manner to compensate
for any significant fluctuations in revenues. Accordingly, shortfalls in
revenues, as we experienced in the second quarter of 2001, may cause significant
variations in operating results in any quarter. If our quarterly results do not
meet the expectations of market analysts or investors, our stock price is likely
to decline.

WE HAVE MANY COMPETITORS AND POTENTIAL COMPETITORS AND WE MAY NOT BE ABLE TO
COMPETE EFFECTIVELY

         The market for our products and services is competitive and subject to
rapid change. We encounter significant competition for the sale of our contract
management software from the internal information systems departments of
existing and potential clients, software companies that target the contract
management markets, professional services organizations and Internet-based
merchants offering healthcare and other products through online catalogs. In
addition, we encounter competition for our contracting portal from other


                                       4
<Page>

Internet-based exchanges, including exchanges established by manufacturers of
healthcare products. Our competitors vary in size and in the scope and breadth
of products and services offered. We anticipate increased competition for market
share and pressure to reduce prices and make sales concessions, which could
materially and adversely affect our revenues and margins.

         Many of our existing competitors, as well as a number of potential new
competitors, have longer operating histories, greater name recognition, larger
customer bases and significantly greater financial, technical and marketing
resources than we do. Such competitors may also engage in more extensive
research and development, undertake more far-reaching marketing campaigns, adopt
more aggressive pricing policies and make more attractive offers to existing and
potential employees and strategic partners. We cannot assure you that our
competitors will not develop products or services that are equal or superior to
our solutions or that achieve greater market acceptance than our solutions. In
addition, current and potential competitors have established or may establish
cooperative relationships among themselves or with third parties. We cannot
assure you that we will be able to compete successfully or that competitive
pressures will not require us to make concessions that will adversely affect our
revenues and our margins, or reduce the demand for our products and services.

WE RELY SIGNIFICANTLY UPON CERTAIN KEY INDIVIDUALS AND OUR BUSINESS WILL SUFFER
IF WE ARE UNABLE TO RETAIN THEM

         We depend on the services of our senior management and key technical
personnel. In particular, our success depends on the continued efforts of A.
Leigh Powell, our Chief Executive Officer, and other key employees. The loss of
the services of any key employee could have a material adverse effect on our
business, financial condition and results of operations.

OUR CHARTER AND BYLAWS COULD DISCOURAGE ACQUISITION PROPOSALS, DELAY A CHANGE IN
CONTROL OR PREVENT TRANSACTIONS THAT ARE IN YOUR BEST INTERESTS

         Our certificate of incorporation and bylaws state that any action that
can be taken by stockholders must be done at an annual or special meeting and
may not be done by written consent, and require reasonable advance notice of a
stockholder proposal or director nomination. Furthermore, the chairman of the
board, the president, the board of directors and the holders of at least 30% of
the shares of our capital stock are the only people who may call a special
meeting. The amended and restated certificate of incorporation and amended and
restated bylaws also provide that members of the board of directors may only be
removed by the vote of the holders of a majority of the shares entitled to vote
for that director. In addition, the board of directors has the authority,
without further action by the stockholders, to fix the rights and preferences of
and issue 5,000,000 shares of preferred stock. These provisions may have the
effect of deterring hostile takeovers or delaying or preventing changes in
control of management, including transactions in which you might otherwise
receive a premium for your shares. In addition, these provisions may limit your
ability to approve other transactions that you find to be in your best
interests. See "Description of Capital Stock" and "--Delaware Anti-Takeover Law
and Certain Charter and Bylaw Provisions."

OUR STOCK PRICE IS LIKELY TO BE HIGHLY VOLATILE AND COULD DROP UNEXPECTEDLY

         The market price of our common stock has been highly volatile and may
continue to fluctuate substantially. As a result, investors in our common stock
may experience a decrease in the value of their shares regardless of our
operating performance or prospects. In addition, the stock market has, from time
to time, experienced significant price and volume fluctuations that have
affected the market prices for the securities of technology companies. In the
past, following periods of volatility in the market price of a particular
company's securities, securities class action litigation was often brought
against that company. Many technology-related companies have been subject to
this type of litigation. We may also become involved in this type of litigation.
Litigation is often expensive and diverts management's attention and resources.

YOU WILL SUFFER IMMEDIATE AND SUBSTANTIAL DILUTION

         The public offering price per share offered pursuant to this Prospectus
may significantly exceed the net tangible book value per share. If we were to
liquidate, investors purchasing shares in this offering would most likely


                                       5
<Page>

receive a per share amount of tangible assets net of liabilities that would be
less than the public offering price per share.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

         This prospectus contains forward-looking statements that involve risks
and uncertainties. We use words such as "believes," "intends," "expects,"
"anticipates," "plans," "estimates," "should," "may," "will," "scheduled" and
similar expressions to identify forward-looking statements. Our forward-looking
statements apply only as of the date of this prospectus. Our actual results
could differ materially from those anticipated in the forward-looking statements
for many reasons, including the risks described above under "Risk Factors" and
elsewhere in this prospectus.

         Although we believe that the expectations reflected in the
forward-looking statements are reasonable, we cannot guarantee future results,
levels of activity, performance or achievements. We are under no duty to update
any of the forward-looking statements after the date of this prospectus to
conform these statements to actual results or to changes in our expectations,
other than as required by law.


                                       6
<Page>

                                 USE OF PROCEEDS

         We will not receive any proceeds from the sale of the shares offered
pursuant to this prospectus.

         The selling stockholders will pay any expenses incurred by the selling
stockholders for brokerage, accounting, tax or legal services or any other
expenses incurred by the selling stockholders in disposing of the shares covered
by this prospectus. We will bear all other costs, fees and expenses incurred in
effecting the registration of the shares covered by this prospectus, including,
without limitation, all registration and filing fees, Nasdaq listing fees and
fees and expenses of our counsel and our accountants.

                              SELLING STOCKHOLDERS

         We issued the shares of common stock covered by this prospectus upon
the closing of the merger of ChiCor with and into a wholly-owned subsidiary (the
"ChiCor Merger"), which took place on November 16, 2000 and upon the closing of
the merger of Intersoft with and into a different wholly-owned subsidiary (the
"Intersoft Merger"), which took place on March 2, 2001. The table below sets
forth, to our knowledge, certain information about the selling stockholders as
of July 3, 2001. Such information has been provided to us by the selling
stockholders.

         We do not know when or in what amounts a selling stockholder may
offer shares for sale. The selling stockholders may decide to not sell any or
all of the shares offered by this prospectus. Because the selling
stockholders may sell all or some of the shares offered by this prospectus,
and because there are currently no agreements, arrangements or understandings
with respect to the sale of any of the shares, we cannot estimate the number
of shares that will be held by the selling stockholders after completion of
the offering. For purposes of this table, however, we have assumed that,
after completion of the offering, none of the shares covered by this
prospectus will be held by the selling stockholders. For the shares offered
hereby by the former ChiCor stockholders, we have agreed to keep the
registration statement of which this prospectus is a part effective until the
first anniversary of the closing of the ChiCor Merger or until all such
shares offered hereby are sold, whichever comes first. For the shares offered
hereby by the former Intersoft stockholders, we have agreed to keep the
registration statement of which this prospectus is a part effective until the
first anniversary of the closing of the Intersoft Merger or until all such
shares offered hereby are sold, whichever comes first.

         The shares offered hereby by the former ChiCor stockholders are
being registered pursuant to the terms of the Agreement and Plan of Merger
and Reorganization among us, ChiCor, certain stockholders of ChiCor and our
wholly-owned subsidiary (the "ChiCor Merger Agreement"). The shares represent
50% of the shares issued at the closing of the ChiCor Merger and any earn-out
shares issued pursuant to the ChiCor Merger Agreement prior to August 1,
2001. Following the first anniversary of the date of the ChiCor Merger, we
have agreed to file a registration statement relating to the balance of the
shares issued in the ChiCor Merger and any additional earn-out shares issued
by that date.

         The shares offered hereby by the former Intersoft stockholders are
being registered pursuant to the terms of the Agreement and Plan of Merger
and Reorganization among us, Intersoft, certain stockholders of Intersoft and
our wholly-owned subsidiary (the "Intersoft Merger Agreement"). The shares
represent 25% of the shares issued at the closing of the Intersoft Merger and
any earn-out shares issued pursuant to the Intersoft Merger Agreement prior
to August 1,2001. Following the first anniversary of the date of the
Intersoft Merger, we have agreed to file a registration statement relating to
the balance of the shares issued in the Intersoft Merger and any additional
earn-out shares issued by that date.

         Beneficial ownership is determined in accordance with the rules of the
Securities and Exchange Commission, or the SEC, and include voting or investment
power with respect to shares. Shares of common stock issuable upon exercise of
warrants and/or stock options that are exercisable within 60 days after June
15,2001 are deemed outstanding for computing the percentage ownership of the
person holding the warrants and/or options but are not deemed outstanding for
computing the percentage ownership of any other person. Unless otherwise
indicated below, to our knowledge, all persons named in the table have sole


                                       7
<Page>

voting and investment power with respect to their shares of common stock, except
to the extent authority is shared by spouses under applicable law. The inclusion
of any shares in this table does not constitute an admission of beneficial
ownership for the person named below.

<Table>
<Caption>
                                           SHARES OF COMMON                                         SHARES OF COMMON
                                       STOCK BENEFICIALLY OWNED                                 STOCK TO BE BENEFICIALLY
                                         PRIOR TO OFFERING (2)          NUMBER OF SHARES        OWNED AFTER OFFERING (2)
                                       -------------------------         OF COMMON STOCK        -----------------------
NAME OF SELLING STOCKHOLDER(1)           NUMBER      PERCENTAGE           BEING OFFERED          NUMBER   PERCENTAGE
- -----------------                        ------      ----------         ----------------         ------    ----------
                                                                                                 
Douglas Jerger (3)                       29,551           *                  16,158              13,393         *
Brian Sullivan (3)                       36,717           *                  20,076              16,641         *
James Montrie (3)(4)                     27,935           *                  15,274              12,661         *
Richard Jones (3)(4)                     26,653           *                  14,573              12,080         *
James Adams (3)(4)                        2,316           *                   1,266               1,050         *
Robert Wermers (3)(4)                     2,170           *                   1,186                 984         *
Andrew Jacomet (3)(4)                       692           *                    378                  314         *
Timothy Vollman (3)(4)                  148,952           *                  81,445              67,507         *
Karl F. Effgen                           12,662           *                  12,662                   0         *
Effgen-Profit
  Sharing Plan                            2,868           *                   2,868                   0         *
Randall H. Wilson (3)(4)                    368           *                    201                  167         *
Samuel F. Walters (3)(4)                    738           *                    403                  335         *
Jamon P. Moore (3)(4)                       368           *                    201                  167         *
Colin McGuigan (3)(4)                       738           *                    403                  335         *
John McCormick (3)(4)                       368           *                    201                  167         *
Kenneth L. Telzrow (5)(6)(7)             60,181           *                  15,045              45,136         *
Richard Eggleton (5)(6)                  27,776           *                   6,944              20,832         *
Marion Van Smith (5)(6)                  27,776           *                   6,944              20,832         *
</Table>

- -------------------
* Less than one percent.

(1)    The term "selling stockholders" includes donees, pledgees, transferees or
       other successors-in-interest selling shares received after the date of
       this prospectus from a selling stockholder as a gift, pledge, partnership
       distribution or other non-sale related transfer.

(2)    Shares do not include any earn-out shares issued on or after August 1,
       2001.

(3)    Shares of common stock beneficially owned prior to and after offering
       include shares held in escrow as of June 30, 2001 to secure
       indemnification obligations under the ChiCor Merger Agreement. Such
       shares have not been adjusted to reflect approximately 19,500 aggregate
       shares which have been withdrawn, or will likely be withdrawn in the near
       future, from escrow and used to pay certain indemnification obligations
       under the ChiCor Merger Agreement.

(4)    Employee of Chicor Inc., one of our wholly-owned subsidiaries.

(5)    Shares of common stock beneficially owned prior to and after offering
       include shares held in escrow as of June 30, 2001 to secure
       indemnification obligations under the Intersoft Merger Agreement.

(6)    Employee of Intoft Corporation (doing business as Intersoft International
       Corporation), one of our wholly-owned subsidiaries.

(7)    Shares of common stock beneficially owned prior to and after offering do
       not include approximately 600 shares purchased by Mr. Telzrow in a
       transaction unrelated to the Intersoft Merger.


                                       8
<Page>

                                    DILUTION

         This offering is for sales of stock by our existing stockholders on a
continuous or delayed basis in the future. Sales of common stock by stockholders
will not result in a change to our net tangible book value per share before and
after the distribution of shares by the selling stockholders. There will be no
change in net tangible book value per share attributable to cash payments made
by purchasers of the shares being offered. Prospective investors should be
aware, however, that the market price of our shares may not bear any rational
relationship to net tangible book value per share.


                                       9
<Page>

                              PLAN OF DISTRIBUTION

       The shares covered by this prospectus may be offered and sold from time
to time by the selling stockholders. The term "selling stockholders" includes
donees, pledgees, transferees or other successors-in-interest selling shares
received after the date of this prospectus from a selling stockholder as a gift,
pledge, partnership distribution or other non-sale related transfer. The selling
stockholders will act independently of us in making decisions with respect to
the timing, manner and size of each sale. Such sales may be made on one or more
exchanges or in the over-the-counter market or otherwise, at prices and under
terms then prevailing or at prices related to the then current market price or
in negotiated transactions. The selling stockholders may sell their shares by
one or more of, or a combination of, the following methods:

       -    purchases by a broker-dealer as principal and resale by such
            broker-dealer for its own account pursuant to this prospectus;

       -    ordinary brokerage transactions and transactions in which the broker
            solicits purchasers;

       -    block trades in which the broker-dealer so engaged will attempt to
            sell the shares as agent but may position and resell a portion of
            the block as principal to facilitate the transaction;

       -    an over-the-counter distribution;

       -    in privately negotiated transactions; and

       -    in options transactions.

       In addition, any shares that qualify for sale pursuant to Rule 144 may be
sold under Rule 144 rather than pursuant to this prospectus.

       To the extent required, this prospectus may be amended or supplemented
from time to time to describe a specific plan of distribution. In connection
with distributions of the shares or otherwise, the selling stockholders may
enter into hedging transactions with broker-dealers or other financial
institutions. In connection with such transactions, broker-dealers or other
financial institutions may engage in short sales of the common stock in the
course of hedging the positions they assume with selling stockholders. The
selling stockholders may also sell the common stock short and redeliver the
shares to close out such short positions. The selling stockholders may also
enter into option or other transactions with broker-dealers or other financial
institutions which require the delivery to such broker-dealer or other financial
institution of shares offered by this prospectus, which shares such
broker-dealer or other financial institution may resell pursuant to this
prospectus (as supplemented or amended to reflect such transaction). The selling
stockholders may also pledge shares to a broker-dealer or other financial
institution, and, upon a default, such broker-dealer or other financial
institution may effect sales of the pledged shares pursuant to this prospectus
(as supplemented or amended to reflect such transaction).

       In effecting sales, broker-dealers or agents engaged by the selling
stockholders may arrange for other broker-dealers to participate. Broker-dealers
or agents may receive commissions, discounts or concessions from the selling
stockholders in amounts to be negotiated immediately prior to the sale.

       In offering the shares covered by this prospectus, the selling
stockholders and any broker-dealers who execute sales for the selling
stockholders may be deemed to be "underwriters" within the meaning of the
Securities Act in connection with such sales. Any profits realized by the
selling stockholders and the compensation of any broker-dealer may be deemed to
be underwriting discounts and commissions.

         In order to comply with the securities laws of certain states, if
applicable, the shares must be sold in such jurisdictions only through
registered or licensed brokers or dealers. In addition, in certain states the
shares may not be sold unless they have been registered or qualified for sale in
the applicable state or an exemption from the registration or qualification
requirement is available and is complied with.

         We have advised the selling stockholders that the anti-manipulation
rules of Regulation M under the Exchange Act may apply to sales of shares in the
market and to the activities of the selling stockholders and their affiliates.


                                       10
<Page>

In addition, we will make copies of this prospectus available to the selling
stockholders for the purpose of satisfying the prospectus delivery requirements
of the Securities Act, which may include delivery through the facilities of the
Nasdaq National Market pursuant to Rule 153 under the Securities Act. The
selling stockholders may indemnify any broker-dealer that participates in
transactions involving the sale of the shares against certain liabilities,
including liabilities arising under the Securities Act.

         At the time a particular offer of shares is made, if required, a
prospectus supplement will be distributed that will set forth the number of
shares being offered and the terms of the offering, including the name of any
underwriter, dealer or agent, the purchase price paid by any underwriter, any
discount, commission and other item constituting compensation, any discount,
commission or concession allowed or reallowed or paid to any dealer, and the
proposed selling price to the public.

         We have agreed to indemnify the selling stockholders against certain
liabilities, including certain liabilities under the Securities Act.

         For the shares offered hereby by the former ChiCor stockholders, we
have agreed with the former ChiCor stockholders to keep the registration
statement of which this prospectus constitutes a part effective until the
earlier of (i) such time as all of the shares covered by this prospectus have
been disposed of pursuant to and in accordance with the registration statement
or (ii) the first anniversary of the closing of the ChiCor Merger.

         For the shares offered hereby by the former Intersoft stockholders, we
have agreed with the former Intersoft stockholders to keep the registration
statement of which this prospectus constitutes a part effective until the
earlier of (i) such time as all of the shares covered by this prospectus have
been disposed of pursuant to and in accordance with the registration statement
or (ii) the first anniversary of the closing of the Intersoft Merger.

                                  LEGAL MATTERS

         The validity of the shares of common stock offered hereby will be
passed upon for us by Hale and Dorr LLP, Boston, Massachusetts.

                                     EXPERTS

         The financial statements as of December 31, 1999 and 2000, and for each
of the three years in the period ended December 31, 2000 incorporated by
reference in this prospectus and elsewhere in the registration statement have
been audited by Arthur Andersen LLP, independent public accountants, as
indicated in their report with respect thereto, and are incorporated by
reference herein in reliance upon the authority of said firm as experts in
giving said reports.

                       WHERE YOU CAN FIND MORE INFORMATION

       We file reports, proxy statements and other documents with the SEC. You
may read and copy any document we file at the SEC's public reference room at
Judiciary Plaza Building, 450 Fifth Street, N.W., Room 1024, Washington, D.C.
20549. You should call 1-800-SEC-0330 for more information on the public
reference room. Our SEC filings are also available to you on the SEC's Internet
site at http://www.sec.gov.

       This prospectus is part of a registration statement that we filed with
the SEC. The registration statement contains more information than this
prospectus regarding us and our common stock, including certain exhibits and
schedules. You can obtain a copy of the registration statement from the SEC at
the address listed above or from the SEC's Internet site.


                                       11
<Page>

                       INCORPORATION OF CERTAIN DOCUMENTS

   The SEC requires us to "incorporate" into this prospectus information that we
file with the SEC in other documents. This means that we can disclose important
information to you by referring to other documents that contain that
information. The information incorporated by reference is considered to be part
to this prospectus. Information contained in this prospectus and information
that we file with the SEC in the future and incorporate by reference in this
prospectus automatically updates and supersedes previously filed information. We
incorporate by reference the documents listed below and any future filings we
make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities
Exchange Act of 1934, prior to the sale of all the shares covered by this
prospectus.

(1)      Our Annual Report on Form 10-K for the year ended December 31, 2000;

(2)      Our Quarterly Report on Form 10-Q for the quarter ended March 31, 2001;

(3)      Our Current Report on Form 8-K filed on April 24, 2001; and

(4)      The description of our common stock contained in our Registration
         Statement filed June 23, 2000 under Section 12 of the Securities
         Exchange Act of 1934, including any amendment or report filed for
         purposes of updating such description.

         You may request a copy of these documents, which will be provided to
you at no cost, by contacting:

                                  I-many, Inc.
                               537 Congress Street
                              Portland, Maine 04101
                          Attention: Ed Lawrence, Esq.
                            Telephone: (207) 774-3244
                                WWW.IMANYINC.COM


                                       12
<Page>

                                     PART II
                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

       The following table sets forth the costs and expenses incurred by the
Registrant in connection with the sale of common stock being registered. All
amounts are estimated except the SEC registration fee.

<Table>
                                                           
SEC registration fee........................................  $   372.34
Legal fees and expenses.....................................   10,000.00
Accounting fees and expenses................................   30,000.00
Miscellaneous...............................................    2,627.66
                                                              ----------
Total.......................................................  $43,000.00
                                                              ==========
</Table>

ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

       Article SEVENTH of the Registrant's Amended and Restated Certificate of
Incorporation provides that no director of the Registrant shall be personally
liable to the Registrant or its stockholders for any monetary damages for any
breach of fiduciary duty as a director, except to the extent that the Delaware
General Corporation Law prohibits the elimination or limitation of liability of
directors for breach of fiduciary duty.

       Article EIGHTH of the Registrant's Amended and Restated Certificate of
Incorporation sets forth procedures for the indemnification of the officers and
directors of the Registrant. Article EIGHTH further provides that the
indemnification provided therein is not exclusive, and provides that in the
event that the Delaware General Corporation Law is amended to expand the
indemnification permitted to directors or officers the Registrant must indemnify
those persons to the fullest extent permitted by such law as so amended.

       Section 145 of the Delaware General Corporation Law provides that a
corporation has the power to indemnify a director, officer, employee or agent of
the corporation and certain other persons serving at the request of the
corporation in related capacities against amounts paid and expenses incurred in
connection with an action or proceeding to which he is or is threatened to be
made a party by reason of such position, if such person shall have acted in good
faith and in a manner he reasonably believed to be in or not opposed to the best
interests of the corporation, and, in any criminal proceeding, if such person
had no reasonable cause to believe his conduct was unlawful; provided that, in
the case of actions brought by or in the right of the corporation, no
indemnification shall be made with respect to any matter as to which such person
shall have been adjudged to be liable to the corporation unless and only to the
extent that the adjudicating court determines that such indemnification is
proper under the circumstances.

ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

       (a) Exhibits:

<Table>
<Caption>
EXHIBIT NO.                                 EXHIBIT
- -----------      ------------------------------------------------------------
              
 3.1+            Certificate of Incorporation of the Registrant, as amended

 3.2+            Form of Amended and Restated Certificate of Incorporation

 3.3+            Bylaws

 3.4+            Form of Amended and Restated Bylaws

 4.1+            Specimen certificate for shares of common stock

 4.2+            Description of capital stock (contained in the Certificate of
                 Incorporation filed as Exhibit 3.1)
</Table>

                                      II-1
<Page>

<Table>
<Caption>
EXHIBIT NO.                                 EXHIBIT
- -----------      ------------------------------------------------------------
              
 5.1             Opinion of Hale and Dorr LLP (previously filed as an exhibit to
                 this registration statement)

23.1             Consent of Arthur Andersen LLP

24.1++           Power of Attorney


- ------------------------

+      Incorporated by reference to the Registrant's Registration Statement on
       Form S-1, as amended (File No. 333-32346) originally filed with the SEC
       on March 13, 2000.

++     Previously filed

(b)    Financial Statement Schedules.

       None.

ITEM 17. UNDERTAKINGS.

       Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the provisions described in Item 15 above, or otherwise,
the Registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the Securities Act and is, therefore, unenforceable. In the event that a
claim for indemnification against such liabilities (other than the payment by
the Registrant of expenses incurred or paid by a director, officer or
controlling person of the Registrant in the successful defense of any action,
suit or proceeding) is asserted by such director, officer or controlling person
in connection with the securities being registered, the Registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such issue.

       The undersigned Registrant hereby undertakes:

       (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement:

              (i) To include any prospectus required by Section 10(a)(3) of the
       Securities Act of 1933, as amended (the "Securities Act");

              (ii) To reflect in the prospectus any facts or events arising
         after the effective date of this registration statement (or the most
         recent post-effective amendment thereof) which, individually or in the
         aggregate, represent a fundamental change in the information set forth
         in this registration statement. Notwithstanding the foregoing, any
         increase or decrease in the volume of securities offered (if the total
         dollar value of securities offered would not exceed that which was
         registered) and any deviation from the low or high end of the estimated
         maximum offering range may be reflected in the form of prospectus filed
         with the Commission pursuant to Rule 424(b) if, in the aggregate, the
         changes in volume and price represent no more than 20 percent change in
         the maximum aggregate offering price set forth in the "Calculation of
         Registration Fee" table in the effective registration statement; and

              (iii) To include any material information with respect to the plan
       of distribution not previously disclosed in this registration statement
       or any material change to such information in this registration
       statement;

provided, however, that paragraph (1)(i) and (1)(ii) do not apply if the
information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed by the Registrant pursuant to
Section 13 or Section 15(d) of the Securities Exchange Act of 1934, as amended
(the "Exchange Act"), that are incorporated by reference in this Registration
Statement.
                                      II-2
<Page>


       (2) That, for the purposes of determining any liability under the
Securities Act, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at the time shall be deemed to be the initial bona
fide offering thereof.

       (3) To remove from registration by means of a post-effective amendment
any of the securities being registered which remain unsold at the termination of
the offering.

         The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
Registrant's annual report pursuant to Section 13(a) or 15(d) of the Exchange
Act (and, where applicable, each filing of an employee benefit plan's annual
report pursuant to Section 15(d) of the Exchange Act) that is incorporated by
reference in the registration statement shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering
thereof.


                                      II-3
<Page>

                                    SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-3 and has duly caused this
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in Portland, Maine on August 9, 2001.

                                        I-MANY, INC.

                                        By:  /s/ A. LEIGH POWELL
                                           -------------------------------------
                                           A. Leigh Powell

                                           President and Chief Executive Officer

     Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed below by the following persons in
the capacities and on the dates indicated.

<Table>
<Caption>
                  SIGNATURE                    TITLE(S)                                          DATE
                  ---------                    --------                                          ----

                                                                                           
/s/ A. LEIGH POWELL
- ---------------------------------              President, Chief Executive Officer                August 9, 2001
A. Leigh Powell                                and Chairman of the Board of Directors
                                               (Principal Executive Officer)

/s/ PHILIP M. ST. GERMAIN                      Chief Financial Officer, Treasurer and            August 9, 2001
- ---------------------------------              Director (Principal Financial and
Philip M. St. Germain                          Accounting Officer)


*/s/ WILLIAM F. DOYLE
- ---------------------------------              Director                                          August 9, 2001
William F. Doyle

*/s/ JEFFREY HORING
- ---------------------------------              Director                                          August 9, 2001
Jeffrey Horing

*/s/ MURRAY B. LOW
- ---------------------------------              Director                                          August 9, 2001
Murray B. Low

*/s/ E. DAVID HETZ
- ---------------------------------              Director                                          August 9, 2001
E. David Hetz

* By: /s/ A. LEIGH POWELL
- --------------------------------
A. Leigh Powell
Attorney-in-fact
</Table>


                                      II-4
<Page>

                                  EXHIBIT INDEX

<Table>
<Caption>
EXHIBIT NO.                                EXHIBIT
- -----------      ------------------------------------------------------------
              
 3.1+            Certificate of Incorporation of the Registrant, as amended

 3.2+            Form of Amended and Restated Certificate of Incorporation

 3.3+            Bylaws

 3.4+            Form of Amended and Restated Bylaws

 4.1+            Specimen certificate for shares of common stock

 4.2+            Description of capital stock (contained in the Certificate of
                 Incorporation filed as Exhibit 3.1)

 5.1             Opinion of Hale and Dorr LLP (previously filed as an exhibit to
                 this registration statement)

23.1             Consent of Arthur Andersen LLP

24.1++           Power of Attorney
</Table>

- ------------------------

+      Incorporated by reference to the Registrant's Registration Statement on
       Form S-1, as amended (File No. 333-32346) originally filed with the SEC
       on March 13, 2000.

++     Previously filed.