YaCy

YaCy is a free search engine that anyone can use to build a search portal for their intranet or to help search the public internet. When contributing to the world-wide peer network, the scale of YaCy is limited only by the number of users in the world and can index billions of web pages. YaCy offers you the possibility to integrate it as portal for your webpage using a source code.
Imagine if, rather than relying on the proprietary software of a large professional search engine operator, your search engine was run by many private computers which arent under the control of any one company or individual. Well, thats what YaCy does!
It is fully decentralized, all users of the search engine network are equal, the network does not store user search requests and it is not possible for anyone to censor the content of the shared index. We want to achieve freedom of information through a free, distributed web search which is powered by the worlds users.System requirementsJava 1.5