OpenGL Mathematics (GLM)
Matlab toolbox for Geometry Processing
Computational geometry and spatial indexing on the sphere
The Computational Geometry Algorithms Library
Google's software suite for combinatorial optimization
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
MathMod is a mathematical modeling software
Command-line operators for netCDF and HDF files
fast C++ library for GPU linear algebra & scientific computing
Precision Trigonometry: Advanced Calculator for Complex Math
Social Network Analysis and Visualization software
A cross-platform fractal explorer