The eGranary's interface includes a word search powered by Lucene and Solr, an online public access catalog powered by VuFind which contains over 60,000 records, and dozens of portals cooperatively developed with experts from around the world.
Flax provides independent open source search solutions based on the Xapian and Lucene/Solr platforms.
Lucene Geographic and Temporal (LGTE) is an information retrieval tool developed at Technical University of Lisbon which can be used as a search engine or as evaluation system for information retrieval techniques for research purposes.