AUTO The Continuation and Bifurcation Software for Ordinary Differential Equations. Topics include Bibliography, Documentation, and Download.
Diffpack Online An object oriented development framework for the solution of partial differential equations. Free demo CD. Online ordering.
Dr. Hanley's Science Graphs Enter first and second order non-linear ordinary differential in analytical form. The program will generate a numerical solution to the equations and graph multiple curves on a single graph. Can also be used for algebra and calculus formulas. Includes illustrations and free demo.
FlexPDE A general, script driven solution system for Partial differential equations, including equation interpretation, mesh generation, numerical solution and graphical output.
Phaser A universal simulator for dynamical systems.
XMDS: eXtensible Multi-Dimensional Simulator A code generator that integrates equations based at human readable form in an XML file, it goes away and writes and compiles a C++ program that integrates those equations as fast as it can possibly be done in selected hardware architecture. [Open source, GPL]