RavenDB

RavenDB implements basic NoSQL data storage principles, allowing developers to easily and quickly store and retrieve information from documents saved on disk.

Using classical key-value pair storage patterns, easy manageable collections, and a friendly HTTP API, data stored inside the database is both well-organized and easy accessible at the same time.

This makes RavenDB ideal for storing complex structures inside a database document, while the optimizations for the .NET environment give it an extra boost in speed and performance.

RavenDB is open sourced for non-commercial projects and available under a commercial license for everything else.

Features:

• A very safe system
• Scalable infrastructure
• Support for Map/Reduce concepts
• Support for ACID transactions
• Sharding
• Replication
• Versioning
• Easily rebuild indexes
• C# 5 ready
• Schema free system
• Small query times
• Backups can easily be created
• Support for data streams and attachments
• Built-in search engine
• Built-in caching system
• Extensible
• Management user interface
• Documentation
• Lots of APIs available

Requirements:

• .NET Framework 4 or higher
• Silverlight 4 or higher