OpenGL Mathematics (GLM)
Computational geometry and spatial indexing on the sphere
Matlab toolbox for Geometry Processing
Google's software suite for combinatorial optimization
The Computational Geometry Algorithms Library
CUDA Templates for Linear Algebra Subroutines
fast C++ library for linear algebra & scientific computing
General Mission Analysis Tool
C++ library for half precision floating point arithmetics.
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
Numerical and Symbolic Math Tool
statistical tests & psuedo- random number generators (RNGs, PRNGs)
Android, UIQ 3.0, Series 60 Edition 5 open-source software
Data Visualization and Analysis
Command-line operators for netCDF and HDF files
MathMod is a mathematical modeling software
A cross-platform fractal explorer
Precision Trigonometry: Advanced Calculator for Complex Math
fast C++ library for GPU linear algebra & scientific computing