SQLDeveloper

Oracle SQL Developer is a free graphical tool that enhances productivity and simplifies database development tasks.

With SQL Developer, you can browse database objects, run SQL statements and SQL scripts, edit and debug PL/SQL statements, manipulate and export data, and view and create reports. You can connect to Oracle databases, and you can connect to selected third-party (non-Oracle) databases, view metadata and data, and migrate these databases to Oracle.