Monte Carlo tree search for the travelling salesman problem (MCTS for the TSP)

Various useful numerical algorithms which can be used almost standalone.

Simple arithmetic coding library in C

Heavily optimized library for DEFLATE/zlib/gzip compression and decompression

Super fast C++ .PNG writer/reader

Blitsort is an in-place stable adaptive rotate mergesort / quicksort.

PortAudio is a cross-platform, open-source C language library for real-time audio input and output.

stb single-file public domain libraries for C/C++

Memory Debugger for Windows, Linux, Mac, and Android

A font cooking library

Hash function quality and speed tests

A set of C++ classes that provide a common API for realtime audio input/output across Linux (native ALSA, JACK, PulseAudio and OSS), Macintosh OS X (CoreAudio and JACK), and Windows (DirectSound, A…