libuEv is a small event loop that wraps the Linux epoll() family of APIs. It is similar to the more established libevent, libev and the venerable Xt(3) event loop. The u (micro) in the name refers to both its limited feature set and the small size impact of the library.

Clang-format is both a library and a stand-alone tool with the goal of automatically reformatting C++ sources files according to configurable style guides. To do so, clang-format uses Clang's Lexer to transform an input file into a token stream and then changes all the whitespace around those tokens. The goal is for clang-format to both serve both as a user tool (ideally with powerful IDE integrations) and part of other refactoring tools, e.g. to do a reformatting of all the lines changed during a renaming.