A minimalistic digital logic simulator
FEATool Multiphysics is an easy-to-use FEA and CFD Simulation Toolbox
Static and Dynamic Structural Analysis of 2D and 3D frames.
OpenNum lets you distribute solvers with a nice graphical interface
Real-time interactive 3D graphics API for scientific simulations
PDBManip is a free program for editing PDB (Protein Data Bank) Files
LIME is a software tool for creating multiphysics simulation codes.
A Spectral Element Solver for Structural Health Monitoring Application