sphinx

Sphinx 0.9.9 branch is officially feature-frozen and we are making
0.9.9-rc2 available. As those who've been following 0.9.x releases
should be accustomed to, despite a modest rc1 to rc2 tag change it
adds about 30 new features once again.

Sphinx is a full-text search engine, distributed under GPL version 2. Commercial licensing (eg. for embedded use) is also available upon request.

Generally, it's a standalone search engine, meant to provide fast, size-efficient and relevant full-text search functions to other applications. Sphinx was specially designed to integrate well with SQL databases and scripting languages.

Currently built-in data source drivers support fetching data either via direct connection to MySQL, or PostgreSQL, or from a pipe in a custom XML format. Adding new drivers (eg. to natively support some other DBMSes) is designed to be as easy as possible.