a BitTorrent library written in C++ for *nix. It is designed to avoid redundant copying and storing of data that other clients and libraries suffer from. Licensed under the GPL.
a component system that will provide extensibility and re-usability both inside and between applications, while being portable across platforms (and languages) and having the lowest possible overhead (both in machine resources and programming effort).
a compiler cache. It acts as a caching pre-processor to C/C++ compilers. Caching previous compilations and detecting when the same compilation is being done again. (needs GCC or similar)
an Open Source Probabilistic Information Retrieval library, a highly adaptable toolkit to allow developers to easily add advanced indexing and search facilities to their own applications.