Nifty Sim is a high-performance nonlinear finite element solver, developed at University College London. A key feature is the option of GPU-based execution, which allows the solver to significantly out-perform equivalent commercial packages.
LIME is a software tool for creating multiphysics simulation codes.
...LIME is intended to be especially useful when separate computer codes (which may be written in any standard computer language) already exist to solve different parts of a multiphysics problem. LIME provides the key high-level software (written in C++), a well defined approach (with example templates), and interface requirements to enable the assembly of multiple physics codes into a single coupled-physics simulation code.
To achieve its flexible lightweight design objectives, LIME 1.0 requires that some amount of customized software be written each time a new multiphysics application is created. ...
This windows program is a very basic simulator with an eclectic feature set. It simulates the 3 space dimensions, time, gravity and mass. Fixed length text file lists input points, lines, polygons. Includes 2 star catalogs. Key and mouse controls.