open-cascade

Fast, free and open-source 3D model viewer for Android: STL, OBJ, 3MF, STEP, IGES. Section cuts, measuring, wall thickness, weight estimates. No ads, no tracking.

CAD for 3D printing and maker projects. Precise solids, mesh sculpting, maker hardware, print checks and local MCP integration.

A verifiable engineering knowledge engine that turns technical documents, CAD models, and equipment data into structured knowledge for humans and AI agents.

Parametric FreeCAD eyewear/frame design with lens, bevel, and OCC experiments

Closed-die impression forging simulator (2D/3D rigid-viscoplastic FEM, GPU/CPU solvers, STEP import) by Marconnet Technologies LLC. CC BY-NC 4.0.

VexForm -- Intelligent Blueprint-to-3D Engineering Engine

Diedro: planos de fabricación desde STEP, offline y gratis para Android (GPL-3.0-or-later)

A lightweight, offline parametric 3D box generator with a live real-time preview, built for 3D printing and CAD editing. Features rounded corners, cut-away view, 3D dimension overlays, and native STL and STEP export (via build123d/OpenCascade). Written in Python with PySide6 and PyVista.

EWDraw CAD Component is a versatile desktop tool for Windows that enables you to create and edit 3D meshes with comprehensive viewing modes and useful modeling tools, perfect for CAD and GIS applications.