List of 31 Flex APIs, Libraries, Components and Tools

more @ http://seantheflashguy.com/blog/2007/08/21/list-of-31-flex-apis-libraries-components-and-tools/

The Flex Online Compiler allows you to experience Flex 2 for yourself, without needing to download or install anything.

link @ http://try.flex.org/

Actionscript 3.0cheatsheet

download @ http://actionscriptcheatsheet.com/blog/quick-referencecheatsheet-for-actionscript-20/

Understand how Flex works and what it can do

more @ http://coenraets.org/testdrive/flex4j/index.htm

good tutorial link for beginners in flex2.0

http://www.senocular.com/flash/tutorials/as3withmxmlc/