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