OpenGL Mathematics (GLM)
Google's software suite for combinatorial optimization
The Computational Geometry Algorithms Library
CUDA Templates for Linear Algebra Subroutines
Computational geometry and spatial indexing on the sphere
Matlab toolbox for Geometry Processing
fast C++ library for linear algebra & scientific computing
C++ library for half precision floating point arithmetics.
General Mission Analysis Tool
2D & 3D TeX-Aware Vector Graphics Language
For exploring cellular automata like Conway's Game of Life.
Open source finite element software for multiphysical problems
statistical tests & psuedo- random number generators (RNGs, PRNGs)
Data Visualization and Analysis
MathMod is a mathematical modeling software
System dynamics program with additional features for economics
Android, UIQ 3.0, Series 60 Edition 5 open-source software
Command-line operators for netCDF and HDF files
Numerical and Symbolic Math Tool
Precision Trigonometry: Advanced Calculator for Complex Math
SigPack - A signal processing library using Armadillo
fast C++ library for GPU linear algebra & scientific computing