FTL is a generic system-level application programming library written in C++. It features a very broad abstraction of system interfaces, provides many useful generics, and has a very small compile-time overhead.
liblist provides a generic C API for manipulating and traversing doubly-linked lists. It uses opaque handles to hopefully allow a stable ABI in the future.
An FFmpeg and SoX based EBU R128 compliant loudness scanner for audio files.
A command-line utility that simply dumps all attributes of its environment.