Flex SDK Versions

The Flex SDK was open sourced as of version 3.

Version Last Milestone or Stable Release (download)
Gumbo (Flex 4) September 22, 2009
Flex 3 August 18, 2009

Gumbo (Flex 4)

The next version of Flex, code name Gumbo, is now in active development. It is has 3 primary themes:

  • Design in Mind: provide a framework meant for continuous collaboration between designer and developer.
  • Developer Productivity: improve compiler performance and add productivity enhancements to language features like data binding
  • Framework Evolution: take advantage of new Flash Player capabilities and add features required by common use-cases

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Flex 3

Flex 3 was initially released on February 25, 2008. It was focused in 4 areas:

  • Designer/Developer workflow: e.g., enhanced constraints, Flex Component Kit for Flash CS3
  • Working with data: e.g., list effects
  • Adobe AIR applications: support in the framework for Adobe AIR features
  • Platform evolution: e.g., persistent framework caching, compiler performance

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