OraEdit is an editor designed specifically for Oracle. The tool allows you to edit and compile your PL/SQL code directly from the database, create new objects from templates, export all/some source, and recompile all invalid objects. It will even notify you if someone changed the same code you are working on. OraEdit supports workspaces, and multiple databases can be worked on at the same time.
More info:
hxxp://www.dkgas.com/oraeditpro.htm