The Introspector enables the programming tools that deal with sourcecode such as the compiler to communicate in a standard and neutral manner reducing the accidental cost of programming. http://github.com/h4ck3rm1k3/
UMMF is an open-source implementation of UML-compatible meta-meta-model, for the purposes of reifying meta-model implementations and to provide a platform for building flexible model and meta-model transformation tools.
W2g is a framework for building web-based applications such as online databases, intranet portals or CRM systems. It has a object-oriented design and includes a session management, a template engine and a persistency engine based on Apache and MySQL.