Database

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hbase

Spring Data Neo4j E-book Available Now! http://neo4j.org/

neo4j - nosql graph database

Gephi, open source graph visualization

https://gephi.org/ Gephi is an interactive visualization and exploration platform for all kinds of networks and complex systems, dynamic and hierarchical graphs.
Spring Data Neo4j enables POJO based development for the Graph Database Neo4j . It maps annotated entity classes to the Neo4j Graph Database with advanced mapping functionality.

Spring Data Graph with Neo4j Support

http://www.springsource.org/spring-data/neo4j
You never develop code without version control, why do you develop your database without it? Liquibase is an open source (Apache 2.0 Licensed), database-independent library for tracking, managing and applying database changes.

Liquibase > DB Refactoring

http://www.liquibase.org/home
SourceForge Project of the Month January 2012 HyperSQL was selected as the SourceForge Project of the Month for January 2012 and is featured on SourceForge.net home page . An interview with core developers is published here . HyperSQL 2.2.8 Released

HSQLDB

http://hsqldb.org/
http://www.mysql.fr/

MySQL

© 2012, Oracle Corporation and/or its affiliates