Hyper Estraier is a full-text search system. It works as with Google, but based on peer-to-peer architecture. Using Hyper Estraier, we can construct a large-scaled search engine with cheap computers.
Forsythia is an open source weblog publishing platform. The platform supports RSS and Atom feeds, rich-text editing, customizable themes, comments, trackbacks, pingbacks and an XML-RPC interface.
reputron is a knowledge extraction engine platform that covers all aspect of text mining, relevance, indexing and querying on a corpus of text documents.