Flex is a highly productive, free open source framework for building and maintaining expressive web applications that deploy consistently on all major browsers, desktops, and operating systems. While Flex applications can be built using only the free Flex SDK, developers can use Adobe® Flex® Builder™ 3 software to dramatically accelerate development. Try Flex Builder 3 free for 60 days.
Adobe Flex 3 adds powerful new features for creating rich Internet applications (RIAs) for the browser and the desktop.
Create rich Internet applications for the desktop using Flex 3 and Adobe AIR.
Flex is now open source with the release of Flex 3.
Already free for students and faculty, Flex is now free for all education customers.