* [[http://www.multidmedia.com|MDM Zinc]] – to create a serious application that involves file operations or Windows controllers like Media Player, IE, etc.
* [[http://code.google.com/p/tweener/|Tweener class @ Google Code]] – for creating tweenings and other transitions. Support sequences.
* [[http://groups.yahoo.com/group/flexcoders/|flexcoders @ Yahoo! Groups]] – discussion about developing Rich Internet Applications using Macromedia Flex.