Jeff's Search Engine Caff�: Open Source Search Engines, Retrieval Tools and LibrariesInformation Retrieval research and search engine development discussion. Updated 8/19/2009: The tools on this page are still pretty current. It's worth noting that you may wish to see Vik Singh's comparison of open source search engines. I do have issues with his results: I know from significant experience that Lucene does not have good relevancy out of the box and since it appears to come out on
