Gambit is a library of game theory software and tools for the construction
and analysis of finite extensive and normal form games. Gambit is designed
to be portable across platforms.

Gambit includes:
   - A graphical user interface, based upon the wxWindows library, providing
     a common look-and-feel across platforms.
   - The Gambit Command Language, a scripting language with built-in
     primitives for constructing and analyzing games.
   - A library of C++ source code for representing games, suitable for use
     in other applications.

WWW: http://www.hss.caltech.edu/gambit/