Flex SDK

Overview

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.

This site is focused on the development of the Flex SDK. If you are looking for more information on how to use Flex, you may wish to visit the Flex Developer Center.

Flex 3 is the latest production quality release.
Gumbo (Flex 4) is currently under development.

More information

Download

Flex SDK version 3.3.0.4852 is the latest production quality release.

Flex 4 Beta 1 Milestone build 4.0.0.7219 is now available.

Please review the Downloads page for an explanation of the different downloads available.

Adobe also offers these Flex-related products:

Free Adobe Flex SDK (Download)
Adobe Flex Builder (Download)

‍ More downloads

Getting Involved

There are many ways to contribute to Flex:

Ask and answer questions
on the forums and mailing lists
Investigate bugs that have been filed
and contribute patches where appropriate
Request a feature
Contribute to the developer documentation or user documentation

‍ More information

Announcements

06/17/09
Share your experience at the Open Beta Meetings
We hope you've had a chance to get your hands dirty with the Flex 4 and Flash Builder 4 betas.
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06/01/09
Flex 4 SDK Beta is here!
We're excited to announce that Flex 4 SDK beta (previously code named Gumbo) is now available!
(more)

03/16/09
I12 Open Iteration Meeting
When: March 24th - 10:15am PT / 1:15pm ET / 5:15pm GMT (duration 45 minutes)
(more)

03/04/09
Flex SDK 3.3 Released
Flex 3.3, the latest version of the Flex SDK, is now available for download. The Flex 3.3...
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