I almost always use Flex Builder to edit Flex code, but when I double click on a file to quickly look at it, my Mac displays it with TextMate. I asked on Twitter today about Flex/AS color coding support for TextMate and Jeff Self came to my rescue. This blog post tells you how to get the bundles and it works great, except that the URLs used for SVN are out of date.

Replace

http://macromates.com/svn/Bundles/trunk/Review/Bundles/Flex.tmbundle

with

http://svn.textmate.org/trunk/Review/Bundles/Flex.tmbundle/

and replace

http://macromates.com/svn/Bundles/trunk/Review/Bundles/ActionScript\ 3.tmbundle

with

http://svn.textmate.org/trunk/Review/Bundles/ActionScript 3.tmbundle/