Find it, possibly near you with Apache Solr

Apache Solr is a state of the art, high performance and scalable search and information retrieval engine you can use or embed in your application to provide a very feature rich search experience. Besides full-text search, it also provides spell checking, highlighting, facets and powerful functions that can put it in the realm of a general information retrieval engine, replacing complex database queries you would (need to) use otherwise.

Given its document oriented storage paradigm of arbitrary fields per entity, it effectively belongs to the realm of NoSQL storage systems (and is used as such in high profile web applications)

Use cases range from e-commerce, real-estate database search, intranets/extranets, content management systems, document management systems and anything that offers exploration of structured and/or unstructured information. The recent addition of geo-aware features makes even location based queries possible.

Furthermore, easy to use clustering/cloud aware features make Apache Solr suited for serving very large data sets (several billions of documents/objects).