Flex SDK Versions

The Flex SDK was open sourced as of version 3.

Flex 4 (codename Gumbo)

Flex 4 is now beginning active development. The product plan is not yet complete, but a few areas are under consideration:

• Design in Mind: provide a framework meant for continuous collaboration between designer and developer. Probably involves an additional component model that integrates with the existing Halo components.
• Accelerated Development: take application development from concept to reality quickly. Features could include application templates, architectural framework integration, binding improvements.
• Horizontal Platform Improvements: features that benefit all application and user types. Features could include compiler performance, language enhancements, BiDi components, enhanced text.
• Broadening Horizons: expand the range of applications and use-cases that can leverage Flex. Features could include finding a way to make the framework lighter, supporting more deployment runtimes, runtime MXML.

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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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