FlashDevelop is an open source code editor for ActionScript and Haxe development. It is also a great web development IDE with source-control support (svn, git, mercurial), tasks, snippets, XML/HTML completion and zen-coding for HTML. You also get access to various third party plugins... (
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The program works with the following extensions:
fdp,
fdl,
fdb,
fds,
fdt and
fda
