http://www.slideshare.net/rboulton/comparing-open-source-search-engines http://www.slideshare.net/rboulton/comparing-open-source-sea... http://www.osnews.com/s

http://www.slideshare.net/rboulton/comparing-open-source-search-engines http://www.slideshare.net/rboulton/comparing-open-source-sea... http://www.osnews.com/story/21782/Open_Source_Search_Engine_Benchmarks http://www.osnews.com/story/21782/Open_Source_Search_Engine_... Also there's holumbus http://holumbus.fh-wedel.de/ http://holumbus.fh-wedel.de/, an active OSS search engine written in haskell.