ASALI is an open-source code for chemical engineers
FEATool Multiphysics is an easy-to-use FEA and CFD Simulation Toolbox
Modular System for Shelves and Coasts
PySCeS is the Python Simulator of Cellular Systems
Real-time interactive 3D graphics API for scientific simulations
Molecular Dynamics Cell Construction
Interactive program to calculate electronic properties in graphene
Calculate electronic properties of graphene-like nanoribbons
Advanced numerical instruments: adaptive meshing, FE methods, solvers
Open source codes related to dissipative particle dynamics