SOLR : very impressive lucene based search tool

Very impressed with Solr and the development community behind it. http://lucene.apache.org/solr/ 1.5 days of research, submitted bug and resulting immediate patch and I have a fully functional search engine for a project at work. If you've ever thought it would be nice to have your very own google type appliance, I highly recommend you check out solr and the underlying IR engine: lucene.
Tagged java search