Editor (Front-end): https://elementnet.js.org/projects/editor/
Editor (Back-end): https://elementnet.herokuapp.com/projects/editor/
Editor (Nightly Server): https://elementnet-dev.herokuapp.com/projects/editor/
GitHub Organization: https://github.com/elementnet
Scratch Forum Topic: https://scratch.mit.edu/discuss/topic/286069
ElementNetwork is a block-based HTML/CSS/JS editor.