Aptana is pretty good. Personally I prefer something a bit more minimalistic (yet still powerful), so I use emacs. Here's some footage of emacs in action: http:

Aptana is pretty good. Personally I prefer something a bit more minimalistic (yet still powerful), so I use emacs. Here's some footage of emacs in action: http://www.youtube.com/watch?v=u2r8JfJJgy8 http://www.youtube.com/watch?v=u2r8JfJJgy8 It has a bit of a learning curve, but it feels pretty productive once you get used to it, especially when taking advantage of it's many plugins. It's not for everybody, but be sure to check it out, along with some of its tutorials on the web.