2D & 3D TeX-Aware Vector Graphics Language
Satellite tracking software
A Portable General-Purpose Computer Algebra System
JaxoDraw: Feynman Diagrams made easy!
Open-source cross-platform spectrometer device driver
Routines for wavefront propagation in IDL, Matlab, and Python
A powerful arbitrary-precision calculator.
Optical Design Software for simulating systems of lenses, prisms, etc.
Scanning Probe Microscopy Controller and Data Visualization Software
Agent-based simulation toolkit
Java-based nuclear physics data acquisition.