JCreator (last one I saw anyway) did not include a gui builder, though that was as distant as 5 months ago. Netbeans' GUI builder is a bit bloated in what it does generate.

If you want to go the pay route, some time ago I used IntelliJ Idea. Now, the version I used did not include a GUI Designer, but the overall stability and professionalism of the IDE struck me. It was very flexible and capable an IDE, and the latest version (5.0) does include a GUI designer. If you wanna check it out, it can be found at: http://www.jetbrains.com/idea/index.html

Personally, I can live with Netbeans.