MongoDB

MongoDB (from "humongous") is a scalable, high-performance,open source, document-oriented database. Written in C++, MongoDB features:

• Document-oriented storage » JSON-style documents with dynamic schemas offer simplicity and power.
• Full Index Support » Index on any attribute, just like you're used to.
• Replication & High Availability » Mirror across LANs and WANs for scale and peace of mind.
• Auto-Sharding » Scale horizontally without compromising functionality.
• Querying : Rich, document-based queries.
• Fast In-Place Updates » Atomic modifiers for contention-free performance.
• Map/Reduce » Flexible aggregation and data processing.
• GridFS » Store files of any size without complicating your stack.
• Commercial Support » Enterprise class support, training, and consulting available