Oracle JDeveloper is a free integrated development environment with end-to-end support for modeling, developing, debugging, optimizing, and deploying Java applications and Web services. Oracle JDeveloper can be downloaded from Oracle Website. Note tat the
The plugin is work in progress.
The Groovy extension is available through the
Help->Check for Updates menu of JDeveloper. The Groovy plugin is registered in the "Open Source and Partners Extensions" update center.