Last week I visited the Decode new media art exhibition at V&A Museum, London. There was one piece by Joshua Davis on display, and it was mentioned that it was built using the HYPE framework (by Joshua Davis and Branden Hall):
HYPE is a creative coding framework built on top of ActionScript 3. A major goal of HYPE is to allow newcomers to Flash and ActionScript to creatively play and express themselves while they are learning how to program.
The first version came out in the end of October 2009, and version 1.1 was just released.
HYPE @ GitHub: http://github.com/hype/hype