Blacklight - Discovery Interface for any Solr index
Blacklight is an open source OPAC (online public access catalog). It is ruby-on-rails based discovery interface (a.k.a. “next-generation catalog”) especially optimized for heterogeneous collections. It could be used as a library catalog, as a front end for a digital repository, or as a single-search interface to aggregate digital content that would otherwise be siloed. Blacklight uses Solr, an enterprise-scale index for its search engine.
Libraries (or anyone else) can use it to allow people to search and browse their collections online. Currently, Blacklight can index, search, and provide faceted browsing for MaRC records and several kinds of XML documents, including TEI, EAD, and GDMS. Blacklight was developed at the University of Virginia Library.