The Scratch I knew from a while ago was built on Smalltalk, and in fact there's an updated version that runs on Pharo Smalltalk, called 'Phratch'. I have not c

The Scratch I knew from a while ago was built on Smalltalk, and in fact there's an updated version that runs on Pharo Smalltalk, called 'Phratch'. I have not compared the two, but if you want a freer version, I would recommend looking at http://www.phratch.com/ http://www.phratch.com/