GameSeer software (contributed by Panayotis Mertikopoulos):
GameSeer is a tool for students and researchers in game theory that uses Mathematica to generate phase portraits for normal form games under a variety of (user-customizable) evolutionary dynamics.
The whole point behind GameSeer is to provide a dynamic graphical interface that allows the user to employ Mathematica’s vast numerical capabilities from a simple and intuitive front-end. So, even if you’ve never used Mathematica before in your life, you should be able to generate fully editable and customizable portraits quickly and painlessly.