A lighweight logging framework based on just one header file with a set of templates. This logger implements a std::ostream-like interface and is flexible in terms of log targets (every std::ostream-descendant will do) and output types (every type that has a std::ostream-output-operator designed for). Public domain code.
A framework for creating recursive-descent parsers in Python. Heavily inspired by pyparsing and boost::Spirit. Public domain code.