MyOra is absolutely free SQL Tool for Oracle Developers & DBAs.

* No installation required
* No Oracle client required
* Multiple SQL Editors
* Monitor database Performance in Real Time using graphs and bar charts
* Top 5 SQLs (Explain Plan and SQL details) using interactive 3-D bar charts
* Top 5 Resources (Sessions Statistics) using interactive 3-D bar charts

and many more features....

www.myorasql.com