Stealth SDK
What is it?
Stealth is a Software Development Kit, a set of code and tools to help programmers build beautifully functional applications in Flash. Reflecting the strengths of the Flash Platform this devkit was designed to be small, fast, graphic-rich, and work everywhere. So it's perfect for mobile apps and games. And it works in everyone's favorite tools, like Flash Professional or Flash Builder, using ActionScript 3 or even MXML!
License
The Stealth SDK is distributed freely under the GPL open source license and may be used in similarly open sourced software.
For more information on Stealth and its licensing options visit StealthSDK.com.