C++ header-only library that simulates GLSL math
C++ Statistical ToolKit
Agent-based simulation toolkit
Biomolecular electrostatics software
API for all possible cellular automata that work same at all angles
Toolkit for simulations of quantum walks on graphs
Machine learning with Gaussian kernels.
Mad Science
Java toolkit for discrete Image and Signal processing.
A ROOT-integrated toolkit for multivariate analysis
A C++ and Python library for finance, statistics and linear algebra.
R package for Weibull analysis on (life-)time observations.
A slick interface to see various scale analysis algorithms in action.