Add Neo4J entry

free-programming-books.md

@@ -97,6 +97,7 @@
 * [Meta-Lists](#meta-lists)
 * [MySQL](#mysql)
 * [.NET (C# / VB / Nemerle / Visual Studio)](#net-c--vb--nemerle--visual-studio)
+* [Neo4J](#neo4j)
 * [NoSQL](#nosql)
 * [Oberon](#oberon)
 * [Objective-C](#objective-c)
@@ -1171,6 +1172,10 @@ See also [TeX](#tex)
 * [Under the Hood of .NET Memory Management](http://download.red-gate.com/ebooks/DotNet/Under_the_Hood_of_.NET_Management.pdf) (PDF) *(RedGate, By Chris Farrell and Nick Harrison)*
 
 
+###Neo4J
+* [Graph Databases](http://info.neotechnology.com/rs/neotechnology/images/GraphDatabases.pdf)
+
+
 ###NoSQL
 * [CouchDB: The Definitive Guide](http://books.couchdb.org/relax/)
 * [Extracting Data from NoSQL Databases: A Step towards Interactive Visual Analysis of NoSQL Data](http://publications.lib.chalmers.se/records/fulltext/155048.pdf) - Petter Nasholm