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 3.5.0.12683 is the latest production quality release.

Flex 4 Beta 2 Milestone build 4.0.0.10485 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)

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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

08/19/09
Flex SDK 3.5 Released
Flex SDK 3.5, the latest official build, has been released and can also be found on the main Adobe.com ...
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10/12/09
Flex SDK 4 beta 2 available for download
We're excited to announce that the second Flex 4 SDK beta 2 is now available for download! Check out ...
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08/19/09
Flex SDK 3.4 Released and Security Update
Flex SDK version 3.4, the latest production quality release, has been released. You can download...
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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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