PC-BASIC is an interpreter for GW-BASIC files. It can run and convert between ASCII, bytecode, and "protected" (encrypted) .BAS files. It implements floating-point arithmetic in the Microsoft Binary Format (MBF) and can therefore read and write binary data files created by GW-BASIC.
KaHIP - Karlsruhe High Quality Partitioning - is a family of graph partitioning programs that tackle the balanced graph partitioning problem. It focuses on solution quality and implements flow-based methods, more-localized local searches, and several parallel and sequential meta-heuristics.
codemiscs is a collection of exciting, creative, amusing, and innovative commands. It is intended to be fun and useful. It includes a command wrapper (cmd), project generator (mkproject), human language translator (tw), feed reader (rf), images wizard (imgs), colorizer (colorize), slowed down echoer (typewriter), and shell show (show).
TOCC is a Tool for Obsessive Compulsive Classifiers. It implements a file system that uses tags instead of folders, allowing you to classify files however you want. For example, you could tag photos by location, people, and technique (e.g. black & white, HDR). Finding files is as simple as running a query like "give me all files tagged photo and my-love".