YaCy is a personal Web crawler and Web search engine. It's also a P2P-based Web index exchange network without a central server and no censoring possibility. Web crawls can be done locally, or you can trigger a collaborative Web crawl with all other YaCy peers. YaCy is fun to use and shows interesting text, image, audio and video search results with direct links to Ogg, MP3, and video files. It has a cooperative bookmark system and many Web publishing functions.
Better search experience and better multithreading support (using util.concurrent) have been implemented. Bugfixes were made in the blog. New servlets for Threaddump and Collage are included. There are many other small enhancements.
URL: YaCy Distributed Web Search