google-blockly

Blockly is a web-based, graphical programming language. Users can drag blocks together to build an application. No typing required.

Check out the demos:

• Maze - Use Blockly to solve a maze.
• Code - Export a Blockly program into JavaScript, Dart, Python or XML.
• RTL - See what Blockly looks like in right-to-left mode (for Arabic and Hebrew).

Blockly is currently a technology preview. We want developers to be able to play with Blockly, give feedback, and think of novel uses for it. All the code is free and open source. Join the mailing list and let us know what you think.