SUMO is a microscopic, multi-modal traffic simulation.
Portable OS X FOSS applications
A C++ Matrix Library
(RoboSim) Java based Robot Localization and Path Planner Simulator.
GMES is a free Python package for FDTD electromagnetic simulations.
Calculate the number of theoretical trays with McCabe-Thiele method
Advanced numerical instruments: adaptive meshing, FE methods, solvers