PCRaster environmental modeling software
Demonstrates a quadtree for spatial indexing of triangles
OpenNum lets you distribute solvers with a nice graphical interface
Real-time interactive 3D graphics API for scientific simulations
Modbus slave simulator
AVR simulator IDE
A C++ Matrix Library
The software for systems biology/pharmacology modeling
Program to control vJoy / vXbox Device via keyboard, mouse, joystick.
Simulate an epidemic like the Corona Pandemic and look at statistics
PySCeS Constraint Based Modelling
Biomolecular electrostatics software
Radial-velocity & transits analysis tool for exoplanets