Flex 4 SDK and Flash Builder 4 Released
After many months in beta, the Adobe Flex developer team has released the final version of the Flex 4 SDK and Flash Builder 4 (formerly Flex Builder). While the Flex SDK is available for all platforms, Flash Builder 4 is currently only supported on Windows and Mac OS X. The Flex SDK is free to download and use without cost, while Flash Builder is available on a trial basis and requires purchase.

