Step GitHub Repositories (2026) · Open Source Tools

Give your agent CAD superpowers.

SolidCraft: an open-source parametric 3D CAD application built in pure Rust. Desktop, web, and automation through MCP.

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.

Fast and minimalist 3D viewer.

A python library for structural analysis and design

Share is a browser-based BIM & CAD viewer and collaboration platform. Supports IFC, STEP, STL, OBJ, GLTF

CADability is a pure .net class library for modeling and analyzing 3d data, both with your code and interactively. It comes with an optional Windows.Forms user interface, which can be adopted to other environments. It does not refer to other 3d modeling libraries. For data exchange you can use STEP, STL or DXF files.

:feet: jQuery Stepy - A Wizard Plugin

An agent-native CAD SDK for language models to create, inspect, and reconstruct complex, editable 3D models.

Exact B-Rep CAD in TypeScript, with a Claude Code plugin that lets agents write parts and check them on OpenCascade.

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

📐 Describe a part, get a printable model: a native macOS CAD studio powered by Claude Code / Codex and build123d.