Nice: Neo4j version 1.2 final released

Neo4j is a high performance graph database that I usually use with the JRuby neo4j gem and sometimes with Clojure (documentation here).

Neo4j is open source (AGPL v3) and is alternatively available for a reasonable fee with a commercial license (where you don't need to AGPL your project). I took advantage of the free offer to get your first Commercial Basic Server license, even though I am likely to open source my project anyway.