Ever wanted to use a Wii Remote, pheraps a Multitouch surface or the Microsoft Kinect to control your application/game even if web based? If so, then MonoMIG (Multi Input Gateway) is what you are looking for!
XMLSocketd is a server written in C++ to be used with the ActionScript class XMLSocket for communication between Flashmovies.
Can be used for chats, whiteboards, etc in conjunction with any serverside script like PHP for authentication and room handling
With the death of the Saffron UML software that so many developers were getting excited about, Actionscript 3 programmers are left without hope for an easy-to-access and specialized interface for developing UML Class diagrams that generate code stubs.
A Flash and PHP file uploader that can upload unsupported filetypes to your server, but if you wanted to you could use it for a file sharing network based in flash then it can be easily customised.