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Catroid is another cool related project https://github.com/Catrobat/Catroid

There is a feature request for GSoC 2014 "Make Pocket Code Bricks feature-complete to Scratch"

This is great. Every time I visited the Scratch website I wished I could use a similar project on a tablet/smartphone.

They are making a tablet version of Scratch aimed at 5-7 year old kids. Out this summer....