BlueMaxima's Flashpoint - the webgame preservation project.
BlitzMax - With the developing version BlitzMax NG other 'targets' are available: ARM architecture, Raspberry, Android, HTML (Emscripten). RAPID DEVELOPMENT. Just open the IDE, write your code, hit F5 and see immediately the results!
SWF File Player - SWF File Player is a free player for SWF (Shockwave Flash) files.
BlitzPlus - Create 2D Games for Windows.
CheerpX for Flash - its adobe flash player in webassembly
Monkey 2 - An easy to use, cross platform, games oriented programming language