TOra is a Toolkit for Oracle which aims to help the DBA or developer of database applications. Features PL/SQL debugger, SQL worksheet with syntax highlighting, DB browser and a full set of DBA tools. TOra also includes support for MySQL and Postgres.
Basically this is a good tool. But I don't like the new version. It misses 2 good features compared to version 2.1.3: format code and code completion. 2.1.3 works great on both Windows and Linux, so those who don't like the new version can try the older version 2.1.3.