FlashDevelop is a popular free and open source ActionScript 2/3 and web development environment.
FlashDevelop seemlessly integrates with Adobe Flash IDE, Adobe Flex SDK, Mtasc, Haxe and Swfmill.

Main Features

* AS3 Project management with seamless and optimized Adobe Flex SDK integration
* AS2 Project management with seamless Swfmill and Mtasc integration (using a portable standalone command line tool)
* Advanced ActionScript 2 and ActionScript 3 completion & code exploration with automatic classpath detection (even without project)
* Smart contextual Actionscript code generators
* SWF and SWC classes and symbols exploration
* Test movie in Adobe Flash IDE and with clickable error results (Flash CS3)
* MTASC compilation/code checking with clickable error results

Other Features

* Types Explorer
* Automatically cleans ASO files of modified AS2 classes
* Files explorer (can create Flash 8 Trust Files for you)
* Automatic JavaDoc creation from methods
* Smart Actionscript help websearch on F1
* Jump to class/member declaration on F4
* XML, HTML/PHP, JS, CSS code highlighting,
* Multibyte character encoding
* Program menu customization with XML files
* as2api GUI for documentation generation
* Snippets
* Lines bookmarks
* Code folding
* Zoom

You can download the latest version here:

Download


FlashDevelop sources are hosted at GoogleCode:
SVN repository: http://code.google.com/p/flashdevelop/

Publication is based on the contents of http://www.flashdevelop.org/ website.