Open Source Software Library

Apache Solr is an open-source software project focused on search, database, java. It can be evaluated as a transparent, community-developed alternative for individuals, organizations, and technical teams.

SearXNG is an open-source software project focused on search, privacy, self hosted. It can be evaluated as a transparent, community-developed alternative for individuals, organizations, and technical teams.

Whoogle Search is an open-source software project focused on search, privacy, self hosted. It can be evaluated as a transparent, community-developed alternative for individuals, organizations, and technical teams.

YaCy is an open-source software project focused on search, peer to peer, self hosted. It can be evaluated as a transparent, community-developed alternative for individuals, organizations, and technical teams.

Apache Nutch is an open-source software project focused on search, crawler, java. It can be evaluated as a transparent, community-developed alternative for individuals, organizations, and technical teams.

The wiki software that powers Wikipedia and many collaborative knowledge sites.