I'm also surprised that no one's yet mentioned Bret Victor's work. http://worrydream.com/LearnableProgramming/ http://worrydream.com/LearnableProgramming/ His

I'm also surprised that no one's yet mentioned Bret Victor's work. http://worrydream.com/LearnableProgramming/ http://worrydream.com/LearnableProgramming/ His visual interactions for programming are a great advance in the state of the art for fast development, and they've greatly influenced recent advances in development environments - making everything more reactive, and with code and data more intertwined.