If you are a developer and use SQL Plus or if you want to use TOAD but can't get your company to fork over the money for a license, you should grab Oracle's free SQL Developer tool. It's a free and fully supported graphical tool for database development.

You can browse database objects, run SQL statements and SQL scripts, and edit and debug PL/SQL statements. You can also run any number of provided reports, as well as create and save your own.

This application has proven to be a very good tool for me.

For more information and to download a copy, visit Oracle's SQL Developer site.