replicad

PartMode is an open-source, local-first browser-based mechanical CAD application built on OpenCascade WebAssembly, replicad, and three.js. It provides constrained sketches, editable feature history, exact B-rep solid evaluation, multiple bodies, assemblies with mates and exploded views, drawings, inspection tools, and import or export for formats including STEP, STL, AMF, 3MF, SVG, DXF, and PDF. People work through the CAD interface, while permissioned typed agents operate against the same canonical document schema and exact geometry kernel. Browser-approved agents can edit the open project; a separate headless workflow uses an account-owned document. The application runs without a desktop CAD installation, supports anonymous local browser modeling with optional hosted agent connectivity, and is distributed under the GNU AGPL v3 license.

Open CASCADE Technology (OCCT) is an open-source software development platform and CAD geometry kernel for 3D surface and solid modeling, CAD data exchange, and visualization. Its functionality is provided mainly as C++ libraries for applications in computer-aided design, manufacturing, and engineering analysis; the videos describe it as compiled to WebAssembly for browser-based parametric CAD. OCCT is distributed under the GNU Lesser General Public License version 2.1 with a special exception, and may alternatively be used under an Open CASCADE commercial license or contractual agreement.

Amagine3D is an open-source 3D capability layer for hardware creation, developed by Amagine. Its parametric CAD workflow turns natural-language hardware requirements, reference images, and key dimensions into editable enclosures and assembly structures around internal components, producing Python and build123d source code alongside STEP, STL, or color-aware 3MF exports. A 3D-native agent first organizes the requirements into a design brief, then runs the generated source in a browser geometry runtime. It uses the resulting model state and check results for dimensions, part connectivity, interference, and motion clearance to revise or accept the design. The workflow supports multipart structures such as covers, hinges, and latches, including assembly clearances and printing tolerances. Generated parameters can be adjusted in the workbench and written back to the source without regenerating the model. The system can preview, measure, modify, and save complete designs and their check reports.

Procedura is an open-source agentic 3D-modeling tool from SpatiaOS that converts text prompts into editable procedural assemblies rather than point clouds or triangle meshes. It generates OpenSCAD source with named parts and typed mates, plans and builds parts incrementally, and can use reference images and optional Blender render feedback during refinement. Optional passes assign per-part PBR materials and plan articulation, exporting motion to OpenUSD and URDF with Isaac-based validation. It runs locally as a Bun/TypeScript pipeline using a configurable OpenAI-compatible, Gemini, or local model endpoint; it does not provide hosted inference or API keys. The pipeline uses a Manifold-capable OpenSCAD build to compile the generated programs and Blender for renders, and includes a web Studio for composing runs and inspecting intermediate artifacts. The repository is MIT-licensed.

Pascal Editor is an open-source, web-based 3D building editor for creating and sharing architectural projects. It supports architectural elements and objects such as walls, slabs, roofs, zones, doors, windows, and furniture, along with plugins and publishable viewers. The editor is built with React Three Fiber and WebGPU. Its Turborepo monorepo separates scene schemas and state, 3D rendering, editing tools, built-in node definitions, viewer and capture runtimes, shared UI, a standalone Next.js app, and an MCP server that exposes scene tools, resources, prompts, and local storage to MCP-compatible AI hosts. The project can run locally through the @pascal-app/cli package, which starts a persistent editor and authenticated MCP service, stores projects in a local database, and manages the standalone runtime. Reusable editor, viewer, node, core, and capture packages are also distributed through npm.