SWFWire is a set of open-source ActionScript 3 libraries and tools for parsing, editing, and generating SWF files. It’s designed to help developers analyze Flash content, extract embedded assets, or build SWFs programmatically. This project is especially useful for reverse engineering Flash files or building custom Flash pipelines, and includes a visual decompiler/editor.
Gestouch: multitouch gesture recognition library for Flash
...Works with any display list hierarchy structures: native DisplayList (pure AS3/Flex/your UI framework), Starling or ND2D (Stage3D) and 3D libs. Doesn’t require any additional software (may use runtime’s build-in touch support). Works across all platforms (where Flash Player or AIR run of course) in exactly same way. Extendable. You can write your own application-specific gestures.
fPlayer (aka fPlayer or as3flvplayer) moved to http://gokercebeci.com
Free, Small, Quick, Customizable and the Bestest FLV Player on Internet!
f4Player is an open source flash (AS3) video/stream player and library project. It is so small that it is only 13kb and totally free under GPL license.
A few years ago I wanted to play a video (flv) on my webpage and I developed a realy small, simple flv player and I'm still developing it for HTML5 support and JS interface.