Eclipse AXDT
AXDT is a plugin for Eclipse IDE that makes it possible to write MXML and AS3 with code support. You can also compile and build your flex application under same.
Adobe Flash Builder
Adobe Flash Builder 4 (formerly Adobe Flex Builder) software is designed to help software developers rapidly develop cross-pla ...
PowerFlasher FDT
FDT is a powerful Flash/Flex development environment for ActionScript, MXML and haXe. FDT enhances your workflow while increas ...
FlashDevelop
FlashDevelop is a free and open source (MIT license) code editor for Actionscript (2 and 3), Flex (MXML) and HaXe.
It offers:
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Free Flash Effect Generator
Build amazing Flash effects and host them on your website for free.