The Hironico Db Tool is a graphical database client that can run on all major platforms today. It provides a powerfull, feature rich and user friendly set of tools to work with databases of any vendor using Java drivers while being fast & light.
The JDO Learning Tools demonstrate the behavior of Sun's Java Data Objects (JDO). Explore the query language and the persistence manager. Contains prototypes for client/server, web, and EJB architectures. Works with several JDO implementations.