Microsoft has something like that: <a href="https:&#x2F;&#x2F;www.touchdevelop.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.touchdevelop.com&#x2F;</a>
People have also built tools off of Google Blockly:
<a href="https:&#x2F;&#x2F;developers.google.com&#x2F;blockly&#x2F;about&#x2F;showcase" rel="nofollow">https:&#x2F;&#x2F;developers.google.com&#x2F;blockly&#x2F;about&#x2F;showcase</a>