JDeveloper
JDeveloper is the strategic IDE for Oracle.
We have long experience on developing using JDeveloper 9i, 10g and 11g. If you need custom plugins on JDeveloper, please contact us. Some proofs of our JDeveloper extensions are documented here: https://sites.google.com/site/jdeveloperresourcecenter/
Extensions available from Oracle JDeveloper official update center: