* Package name    : yacy
  Version         : 1.8
  Upstream Author :
* URL             : http://www.yacy-websuche.de/wiki/index.php/En:DebianInstall
* License         : GPL
  Programming Lang: java
  Description     : A free (libre) decentralised Internet Search Engine

[debian packages already exist for this software]

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. 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