TextMate (Mac OS X Only)
There is a Groovy plug-in for the popular TextMate editor on Mac OS X here
XCode (Mac OS X only)
Brian McCallister has done a plugin for
A new-format language "mode" for SubEthaEdit 2.x is available
Syntax highligting for VIM has been done by Alessio Pace
Here's a little plugin which allows to run scripts from within Vim. It has been originally created for python, but as the page says it's easy to adapt to probably any language.
Download the latest version of the file, and save it in the /plugin folder of your Vim installation.
Then edit it, and modify the line:
Be sure to have the groovy executable in the system PATH, then simply follow the instruction from the original site for the usage. If you wish, you can search for the strings containing:
and change the value to set the size of the output buffer "pop-up" (F9).
TO-DO: implement complete support for groovy language, as it has be done for ruby:
Guillaume Laforge wrote a syntax file for the TextPad text editor which can be downloaded
Jeremy Rayner has written a groovy-mode for emacs, details of which can be found on the Emacs Plugin page.
Russel Winder has started an alternative to Jeremy's based on CC Mode (Jeremy's was reworking of ruby-mode). Also Stuart Clayman has created a Groovy execution mode. See the Emacs Plugin page for details.
Find more info on the UltraEdit Plugin page.