ScribbleBlox
Based on Scratch by the Lifelong Kindergarten group at MIT, ScribbleBlox is a modification of Scratch that will add more features and blocks.
ScribbleBlocks is under the GNU General Public License version 3 at http://www.gnu.org/licenses/gpl-3.0.txt. It is currently under development by Jonathan50 (scratch|github).
https://scratch.mit.edu/discuss/topic/39898/
Thanks ST!