YaCy (read "ya see")'s a free distributed search engine, built on principles of peer-to-peer (P2P) networks. Its core's a computer program written in Java distributed on several hundred computers,, so-called YaCy-peers. Each YaCy-peer independently crawls through the Internet, analyses and indexes found web pages and stores indexing results in a common database (so called index) which's shared with other YaCy-peers using principles of P2P networks. Compared to semi-distributed search engines, t… (More on Yacy)