H2 is an embeddable RDBMS written in Java
DBMS supporting graph, document, full-text and geospatial models
General-purpose bitemporal database for SQL, Datalog & graph queries
An object relational-mapping (ORM) library for Java
Relational database replication tool based on XML Schema
Java Application Framework
Common Resource Grep
World's first open source data quality & data preparation project
Organizes and searches user-defined items and images in a MySQL DB.
DataAdapter - Java library to work with Oracle and PostgreSQL database
Lucene Oracle Integration using Data Cartridge API