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Apache Flex

The open-source framework for building expressive web and mobile applications.

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Apache Flex is an open-source application framework for building and maintaining web, desktop, and mobile applications. It uses MXML for layout and ActionScript 3 for coding, allowing developers to write reusable code that targets browsers through Adobe Flash Player, desktop and mobile platforms through Adobe AIR, and smart TVs. The project is released under the Apache License 2.0 and maintained by the Apache Software Foundation.

The Apache Flex SDK provides UI components such as buttons, forms, containers, lists, and data grids. It supports development in Eclipse-based IDEs like Adobe Flash Builder and FDT, as well as IntelliJ IDEA and other text editors. Related projects include FlexUnit for unit testing, Blaze DS, FlexJS for HTML and JavaScript output, and the Squiggly spell checker. Apache Flex is packaged as an open-source project with no paid editions or usage-based pricing.

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