The GNU Scientific Library (GSL) is a powerful library of common numerical and scientific functions intended for use in C and C++ software. It serves as an important backend in many software packages.

A powerful machine learning library for Python

A high quality linear algebra library (matrix maths) for the C++ language, aiming towards a good balance between speed and ease of use

FMRIB Software Library

A tool for obtaining maximally-localised Wannier functions

A powerful solver available for LP, QP, QCP, and MIP (MILP, MIQP, and MIQCP) problems

A Powerful Deep Learning Library with GPU Support

A Powerful Library for Computer Vision Applications

A Highly Optimized Linear Algebra Library based on GotoBLAS

Tools and File Structures for Storing and Analyzing Scientific Data