This small program named TRAX is capable of solving systems of ordinary differential equations and plotting the solution on a phase plane as well as function of time. The program is intended for educational purposes. See picture below for interface and capabilities overview as well as usage reference.
The program runs on any Python-enabled platform, including GNU/Linux and MS\Windows OSs. To run the program you will need python interpreter ver. 2.x and compatible versions of numpy, scipy and matplotlib libraries.