Mechanical Engineering GitHub Repositories (2026) · Open Source Tools

Give your agent CAD superpowers.

Official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler.

Package manager for things. Start designing modular hardware! PartCAD is the standard for documenting manufacturable physical products (a.k.a. Digital Thread or TDP). It comes with a set of tools to maintain product information and to facilitate efficient and effective workflows at all product lifecycle phases, boosted by AI.

EngineeringPaper.xyz is a web app that makes it easy to create, save, and share engineering calculations.

AutoCAD MCP server for AI agents (Claude, Cursor, any MCP client): 240+ tools to draw, edit and read DWG/DXF drawings. Live AutoCAD via COM, or headless with ezdxf — no AutoCAD needed. Mechanical sheets with ISO GD&T and tolerances, P&ID (ISA-5.1), floor plans, pipe and cable takeoffs.

git diff for CAD assemblies — two STEP files in, a picture of what changed plus a machine-readable change list out.