SQLeonardo a powerful and easy-to-use tool that lets you query databases

When you work in SQLeonardo, you work in a graphical environment and working with data in this environment means you don't need to understand SQL, the standard programming language for talking to databases.
http://querybuilder.sourceforge.net/
DataVision is a database reporting tool similar to Crystal Reports. It supports many data sources (JDBC, files) and many output formats (HTML, XML, PDF, LaTeX, comma- and tab-separated files, DocBook). Drag-and-drop GUI editing. Reports stored as XML.
http://datavision.sourceforge.net/index.html
TOra is a Toolkit for Oracle which aims to help the DBA or developer of database application. Features PL/SQL debugger, SQL worksheet with syntax highlighting, DB browser and a comprehensive set of DBA tools. TOra also includes support for MySQL and Post
http://tora.sourceforge.net/
QueryCommander is not the complete database administration tool. If you really need to dig down the fundamentals you should use Microsoft Query Analyzer, Toad etc. However, if you need a good tool to rapidly create queries, stored procedures, user defined functions etc, we hope QueryCommander will be your alternative.
Working as a developer architect, one is often put in situations to evaluate other applications. When you are not familiar to the structure of the database, the IntelliSense and other features will allow you to save time.
http://querycommander.rockwolf.com/
OpenReports is a flexible open source web reporting solution that allows users to generate dynamic reports in a browser. OpenReports uses JasperReports, an excellent full featured open source reporting engine, and was developed using leading open source components including WebWork, Velocity, Quartz, and Hibernate.
http://www.oreports.com/