Apache Lucene - Search engine library with many features including fast indexing, ranked searching, boolean, phrase, and span queries, date-range searching, and extension APIs. News, details of sub-projects, documentation, and downloads. [Open Source] The Lucene Search Engine: Powerful, Flexible, and Free - Review by Brian Goetz of Java World praising the open-source search engine. Solr - An open-source search server based on the Lucene Java search library. News, documentation, resources, and download. Compass - An open-source project built on top of Lucene aiming at simplifying the integration of search into any Java application. Overview, download, documentation and support. Supermind Consulting - This firm provides Lucene, Solr and Nutch consulting services. Focus is on vertical search and crawling. Nutch - Open-source web-search software, built on Lucene Java. Project news, documentation, and download.