OpenGL Mathematics (GLM)
OpenGrADS provides extensions and interfaces for GrADS.
Viking is a free/open source program to manage GPS data
For exploring cellular automata like Conway's Game of Life.
Structure-from-Motion and Multi-View Stereo
The fundamental package for scientific computing with Python
Library to control radio transceivers and receivers
SUMO is a microscopic, multi-modal traffic simulation.
Model Railway CAD program
Open source cross-platform Java Visual Traceroute
Real time satellite tracking and orbit prediction
A web-based interface for CNC milling controller running Grbl, Marlin,
TI graphing calculators <-> computer communication software
Open source finite element software for multiphysical problems
Open source Health IT for the planet
CloudCompare main repository
Organic Maps is a free Android & iOS offline maps app for travelers