A powerful, cross platform, SQL database system
Relational Database
A Java SQL client for any JDBC compliant database
An object relational-mapping (ORM) library for Java
Chess Database and PGN viewer
PHP database abstraction layer
Toolkit for working with and mapping geospatial data
ITIL conform CMDB solution for documenting your entire IT landscape
Database Subsetter and Relational Data Browser
Automated tests with databases: prep, verify, restore tables
Deductive Database with Datalog, SQL, RA, TRC, DRC
Java persistence using JDO, JPA or REST