An old favourite of mine, Flash, specifically Actionscript 3. Have moved on to other things since and always tell myself I should go back and do some more of this stuff but probably won't.
Anyways, some of my favourite's
The workflow manager was developed to allow the creation of visio like flowcharts and workflows. It was xml driven and can load external xml from file or embeded within the parent html page.
This is my 1st attempt at an arcade style game. Writen in Actionscript 2, I cobbled together an idea of some sort of platform shooting, rescuing people game thing!
This is actually the same project as the Workflow Manger except in user mode. This is how your flow charts are used after created in the manager.