Open Source Rust CAD Software

SolidCraft is an open-source parametric 3D computer-aided design application built entirely in Rust for mechanical modeling and engineering workflows. It allows users to create constrained sketches and transform them into editable solid models through operations such as extrusion, filleting, and shelling. A parametric feature timeline preserves modeling history and automatically rebuilds geometry when dimensions change. The software supports assemblies, reusable parameters, and geometric measurements. It runs on Windows, macOS, Linux, and web browsers without requiring proprietary CAD infrastructure. A command-line interface enables scripted modeling, rendering, and file exports. SolidCraft also includes a Model Context Protocol server that allows AI agents to create, inspect, and modify designs through structured commands. Its architecture supports interactive design and automated engineering workflows.

CADCraft is an open-source 2D drafting application written in pure Rust as a clean-room reimplementation of familiar AutoCAD workflows. It provides a command line, object snaps, polar tracking, layers, dimensions, hatches, blocks, layouts, plotting, and parametric constraints. Drawing and modification commands cover lines, polylines, circles, splines, offsets, trimming, arrays, grips, and many other common CAD operations. DXF files from R12 through 2018 are handled natively, while DWG support is provided through the open-source acadrust library. Paper space, viewports, page setups, PDF plotting, SVG export, and PNG export are also available. Every CAD operation can be driven through the UI, CLI, JSON control channel, or MCP server. Native builds target macOS, Windows, Linux, and FreeBSD, with a WebAssembly version for browsers.

QymCAD is a free, open-source parametric 3D CAD application for mechanical design, product development, and manufacturing. It uses the OpenCASCADE boundary representation kernel to create precise solid geometry rather than polygonal approximations. Users can construct sketches with geometric constraints, mathematical dimensions, and associative references. Its modeling tools support extrusion, revolution, lofting, sweeping, fillets, chamfers, holes, and patterns. Parts can be combined into assemblies using configurable joints, movement limits, and interference checks. Parametric history automatically rebuilds dependent geometry when dimensions or earlier operations change. The application supports STEP, STL, DXF, and SVG import and export. Available for Windows, macOS, and Linux, QymCAD stores projects locally without requiring cloud services.

Open CAD Studio is a free, open-source computer-aided design application for 2D drafting and 3D modeling. Built with Rust, it provides desktop and browser-based editing environments. Users can open, modify, and save DWG and DXF drawings without relying on an external conversion service. Drafting tools include lines, polylines, splines, dimensions, layers, blocks, and object snapping. Its solid modeling engine supports extrusion, revolution, lofting, and Boolean operations. GPU-accelerated rendering provides orthographic and perspective views. The application also supports plotting, PDF output, mesh importing, and CAD data exporting. Plugins, scripts, and a JSON automation API extend functionality across supported platforms.

a opencascade based parametric CAD application, that focuses more on a blender like behaviour with bodies instead of parts or assemblies that can be freely moved and rotated in space and a edge and face based workflow allowing sketches on almost all surfaces that are flat at any angle forked of SindriCAD, changed quite alot. made with rust and typescript DISCLOSURE This Project uses AI to generate chunks of code, tests and some models via MCP. I actively try to reduce the slop quality of the program by actively using it and reviewing code and guiding the AI step by step following my idea of a good CAD program. if you have feedback you are open to share it as it would help a lot!

AquaSWMM (formerly StormSewer) is a desktop program for stormwater and storm-drain modeling. It edits EPA SWMM 5 models with full undo and runs them on EPA's own unmodified engine. Add 2D overland flow on a terrain grid, couple it to the pipe network (1D-2D), calibrate against observed data, and compare scenarios side by side. Storm-sewer design is built in: Rational method, Manning capacity, standard-step HGL/EGL backwater and HEC-22 inlets, with auto-sizing and a submittal PDF. Imports Civil 3D .stm, LandXML, DXF, shapefiles, GeoJSON and GeoTIFF terrain. Windows, macOS and Linux. The desktop app has a 30-day free trial (email only, no card). The simulation engine, command-line tools and Python package are open source under GPL-3.0, and StormSewer releases 0.11.0 and earlier remain GPL-3.0. Written by a practicing water resources PE.