OpenGL Mathematics (GLM)
Google's software suite for combinatorial optimization
CUDA Templates for Linear Algebra Subroutines
The Computational Geometry Algorithms Library
Matlab toolbox for Geometry Processing
Computational geometry and spatial indexing on the sphere
C++ library for half precision floating point arithmetics.
fast C++ library for linear algebra & scientific computing
General Mission Analysis Tool
For exploring cellular automata like Conway's Game of Life.
Open source finite element software for multiphysical problems
2D & 3D TeX-Aware Vector Graphics Language
System dynamics program with additional features for economics
statistical tests & psuedo- random number generators (RNGs, PRNGs)
Android, UIQ 3.0, Series 60 Edition 5 open-source software
Data Visualization and Analysis
MathMod is a mathematical modeling software
Open-source C/C++ math engine for advanced scientific computing
Numerical and Symbolic Math Tool
A cross-platform fractal explorer
Social Network Analysis and Visualization software
The package for statistical data analysis and applied mathematics