Wonderfl!

FlashDevelop is a free and open source (MIT license) code editor for Actionscript (2 and 3), Flex (MXML) and HaXe.

KoolMoves is a web animation authoring tool that creates Flash animations with multimedia slide shows, media players, and action scripting and frames for animated gifs. Create text effects, import vector clipart, attach wav audio, fill shapes with color gradients or bitmaps, add actions to text buttons and frames, plus more.