FlightGear Flight Simulator: free open-source multiplatform flight sim
Digital Circuits Design and Simulation
Earth orbits and satellite coverage display in 3D on your laptop.
HP-41cx Emulator
instrument control, data acquisition display and analysis
The Project moved to github https://github.com/EnFlexIT/AgentWorkbench
A virtual planetarium for observers of the real sky.
3D vehicle simulator based on Lagrangian dynamics to simulate dynamics
Electric Behaviour of Crystals and Pierce Crystal Oscillators
An easy-to-use Simulation of Hardware-Gates
3D model viewer and world navigator.