GMES is a free Python package for FDTD electromagnetic simulations.
Numerical Transient Simulator for Power System
Distributed Computing with JavaScript
Analyze and visualize coupled residues and their networks in proteins
ActiveFolder can be integrated with existed scientific computation.
A Library for Interactive Modelling and Visualisation
Software for data analysis, image processing, simulations, solver.
Physically-accurate robotics simulator written in Python
GDS visualization and parallelized capacitance extraction
... [BATCH], [ANALYZE] and [OPTIMIZE] cases in OpenFOAM and others