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.
From: http://hype.joshuadavis.com/
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