Flex SDK

Flex is a highly productive, open source framework for building and maintaining expressive web applications that deploy consistently on all major browsers, desktops and operating systems.

Flex 4

The next version of Flex, code name Gumbo

Links

• http://opensource.adobe.com/wiki/display/flexsdk/Flex+SDK
• http://livedocs.adobe.com/flex/
• http://livedocs.adobe.com/flex/gumbo/