db4o is the world's leading open source object database for Java and .NET. Leverage fast native object persistence, ACID transactions, query-by-example, S.O.D.A object query API, automatic class schema evolution, small size (http://developer.db4o.com)
Fast GUI based multilanguage database client (in perl/DBI/Tk). Supports most databases, runs on Windows / Unix / Linux. Powerfull SQL editor, view data in spreadsheets, powerfull filter tools. Form to edit/insert datasets. Highly configurable.
This software help to clone complex Oracle Databases fast and with nearby no effort in EMC^2 Networker or IBM Tivoli environments.
IT's also great for fast restore of database cause it generates required RMAN scripts for your needs.
It also help to clone whole database with Backup plus Oracle Agents for OEM/GC/CC.
It manages oratab file in AIX, Solaris and LINUX based environments and create a standard directory tree below ~/admin/$ORACLE_SID to have a look and feel for all of your databases.