Neo4J
- Graph Databases (PDF)
- Graph Databases 2nd edition (account required)
.NET Framework
- Entity Framework
- Game Creation with XNA
- .NET for Visual FoxPro Developers
- .NET Performance Testing and Optimization – The Complete Guide (RedGate, By Paul Glavich and Chris Farrell)
- Under the Hood of .NET Memory Management (PDF) (RedGate, By Chris Farrell and Nick Harrison)
- Visual Studio .NET Tips and Tricks (VS 2003-2005 only)
NoSQL
- CouchDB: The Definitive Guide
- Extracting Data from NoSQL Databases: A Step towards Interactive Visual Analysis of NoSQL Data – Petter Nasholm (PDF)
- Graph Databases
- Instant MongoDB – Amol Nayak, Packt. (email address requested, not required)
- MongoDB Koans
- MongoDB Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
- NoSQL Databases – Christof Strauch (PDF)
- The Little MongoDB Book
- The Little Redis Book – K. Seguin (PDF, Epub)