UltraEdit is a nice little text editor when working on Windows. It is very much suited to handle all kinds of resource files and some little scripts, when starting your IDE just takes too long.
You can get it from http://www.ultraedit.com/
Now that UltraEdit is on Linux (the column select capabilities alone are worth the $50!), I hunted for a Groovy plugin for UltraEdit and it didn't take long. There's a link in this article to an addition to UltraEdit's wordfile, so you copy/paste and UltraEdit is Groovy aware. Nice.