Tora

TOra (Toolkit For Oracle) is a Database Administration Tool for Oracle, MySQL and PostgreSQL

From the website:

Features

Handles multiple connections.
Asynchronus database communication. UI mostly responsive when accessing database.
Requires no installation on the database side to be fully functional.
Advanced SQL worksheet.
- Code completion.
- Explain execution plan.
- Execution statistics.
- SQL syntax highlighting.
- Quick menu for often used custom SQL.
- Parse error location indication.
- Chart visualization of result.
- PL/SQL block parsing.
Schema browser.
- Table & view editing.
- References & dependencies.
- Tab & tree based browsing.
- Object & data filtering.
PL/SQL editor & debugger.
- Breakpoints.
- Variable watches.
- Line by line stepping.
- Debugger SQL output viewing.
- Syntax structure tree parsing.

Server tuning.
- Server overview.
- Tuning charts.
- I/O by tablespace & file.
- Performance indicators.
- Raw server statistics.
- Parameter editor (P-file editor).
Security manager.
Storage manager with object & extent viewer.
Session manager.
Rollback manager with snapshot too old detection.
SGA & long operations trace.
Current session information.
Statistics manager with parallel analysis.
DBMS alert tool.
Invalid object browser.
SQL output viewer.
Database & schema comparison and server.
Extract schema objects to SQL scripts.
Easily extendible.
- Ability to add support for new or older Oracle versions without programming.
- Well documented plugin API (Only Linux version).
SQL template help with PL/SQL functions and optimizer hints.
Full UNICODE support.
Printing of any list, text or chart.
Cross platform support. Known to work on Linux, Windows and Solaris.