Annotea Project - Open implementation from the W3C enhancing the W3C's Amaya browser for collaboration with shared annotations. Part of the Semantic Web effort to store annotations as accessible metadata.
DAML.org: DARPA Agent Markup Language Homepage - Programme from the Defence Advanced Research Projects Agency to develop a language and tools to facilitate the concept of the semantic web.
Friend of a Friend Project (FOAF) - Creating a web of machine-readable home pages describing people, the links between them, and the things they create and do.
