Founds

A comparison between public-domain search engines (PDF, 20 pages) as of March 2006. They compare Nutch, MnoGoSearch, DataparkSearch and ht//Dig.

UPDATE: There is an another comparison of DataparkSearch made in October 2007: Yury Vetrov’s blog (in Russian). They compare Sphinx, Tsearch2, DataparkSearch, MnoGoSearch and Yandex.Server (free and commercial versions). Overall weighted rating for these search engines is:

1. Sphinx (4,48);
2. DataparkSearch (4,33);
3. Yandex.Server, free version (4,24);
4. Yadex.Server,commercial version (4,09);
5. MnoGoSearch (3,82);
6. Tsearch2 (3,45).

Popularity: 16% [?]