Open source cad projects
Every project in the registry tagged cad, ranked by real GitHub adoption.
SolidCraft: an open-source parametric 3D CAD application built in pure Rust. Desktop, web, and automation through MCP.
Follow your curiosity. Build across disciplines. Open-source software and hardware for polymaths in the making.
Open-source construction ERP - BOQ, PDF/CAD/BIM takeoff, AI cost matching, 293 guided cases. 55,000 priced positions, 44 languages, 195 modules. AGPL-3.0. pip i
Parametric 3D CAD with a real B-rep kernel (OpenCASCADE)
Open-source, local-first 3D parametric CAD that runs in the browser for people and permissioned typed agents, powered by OpenCascade WASM.
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Frequently asked questions
How many open source cad projects are there?
This registry tracks 5 projects tagged cad, with 17,754 GitHub stars between them. The most-adopted is solidcraft at 13,733 stars.
Are these cad projects free to use?
Yes — 5 of the 5 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which cad project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these cad projects still maintained?
5 of the 5 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.