CERTIFICATION

I, Nazzareno Paciotti, certify that:

1. I have reviewed this report on Form 10-KSB of Thinking Tools, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a
material fact or omit to state a material fact  necessary to make the statements
made, in light of the  circumstances  under which such statements were made, not
misleading with respect to the period covered by this report;

3.  Based  on my  knowledge,  the  financial  statements,  and  other  financial
information included in this report, fairly present in all material respects the
financial condition,  results of operations and cash flows of the small business
issuer as of, and for, the periods presented in this report;

4. I am responsible for  establishing  and maintaining  disclosure  controls and
procedures  (as defined in Exchange Act Rules  13a-15(e) and  15d-15(e)) for the
small business issuer and have:

      a)  Designed  such  disclosure  controls  and  procedures,  or caused such
      disclosure controls and procedures to be designed under my supervision, to
      ensure that material  information  relating to the small business  issuer,
      including  its  consolidated  subsidiaries,  is made known to me by others
      within those entities, particularly during the period in which this report
      is being prepared;

      b) Evaluated the effectiveness of the small business  issuer's  disclosure
      controls and procedures and presented in this report my conclusions  about
      the effectiveness of the disclosure controls and procedures, as of the end
      of the period covered by this report based on such evaluation; and

      c)  Disclosed  in this  report any change in the small  business  issuer's
      internal  control over financial  reporting that occurred during the small
      business  issuer's most recent fiscal quarter (the small business issuer's
      fourth fiscal quarter in the case of an annual report) that has materially
      affected, or is reasonably likely to materially affect, the small business
      issuer's internal control over financial reporting; and

5. I have disclosed, based on my most recent evaluation of internal control over
financial  reporting,  to the small  business  issuer's  auditors  and the audit
committee of small business  issuer's board of directors (or persons  performing
the equivalent function):

      a) All significant  deficiencies and material  weaknesses in the design or
      operation  of  internal   control  over  financial   reporting  which  are
      reasonably  likely to adversely affect the small business issuer's ability
      to record, process, summarize and report financial information; and

      b) Any fraud,  whether or not material,  that involves management or other
      employees  who have a  significant  role in the  small  business  issuer's
      internal control over financial reporting.


Date:  April 14, 2004                   By:  /s/ N E Paciotti
                                             --------------------------------
                                        Nazzereno Paciotti
                                        Chief Executive Officer
                                        Chief Financial Officer