Recent and related:
LibreCAD in the Browser - https://news.ycombinator.com/item?id=48755075 - July 2026 (17 comments)
Onshape is free in the browser as long as you are not doing commercial work. It’s a professional system from the founders of Solidworks that competes with all the top CAD tools.
The launch graphic says "Ported end-to-end by Fable, an AI agent" and it definitely feels that way. Buggy, glitchy, needs some love and human eyes before it's really usable.