Flex development on Linux, what's a good free environment?

I use TextMate to do some Flex hacking on my home computer (a PowerBook G4 which can't run FlexBuilder) and I have no trouble writing applications. It depends if you are so used to IDE support that you cannot live without it. I like code completion, project management and the debugger in Flex Builder but I can live without it. TextMate isn't free but any text editor that had code coloring for ActionScript would do for me.

I usually use ant to manage my builds and that is free. The Flex SDK is free. That is all you need plus a little patience.

Personally I only have experience with the free aplha release of Flex builder for Linux built on Eclipse. But I must say it is already pretty stable and it provides most features found in the full releases for mac osx and windows. Perhaps the most annoying thing that's missing is the gui editor to quickly lay out your forms.

If you are looking for another option, however, maybe this will be of any help: http://www.williambrownstreet.net/wordpress/?p=78

It's not an IDE though

You can use plugin fb4linux for eclipse in http://code.google.com/p/fb4linux/ It run perfectly in eclipse 3.6 helios, you can choose flex 3 or flex 4 sdk and you can't recognize this plugin with Flex Builder stand alone verson of Adobe with hight light, auto complete code... good luck.