http://www.mongodb.org

MongoDB is a document-oriented database program. Classified as a
NoSQL database program, MongoDB uses JSON-like documents with
schemas. It has auto-sharding, built-in replication, TTL indexes,
text search as well as an aggregation framework and native MapReduce.

This metapackage will install the mongo shell, import/export tools,
other client utilities, server software, default configuration, and
init.d scripts.