Open Source TypeScript CAD Software

CADAM is an open-source “text-to-CAD” web application that turns natural-language prompts into parametric 3D models, targeting a workflow where you describe what you want and the system produces editable geometry. It is designed around a browser-first experience, so users can iterate quickly without installing a heavyweight desktop CAD suite for every experiment. A key idea is that the generated output is parametric and scriptable, enabling repeatable edits and variations rather than a one-off mesh result. The project integrates modern web tooling and a backend stack to manage sessions, model generation requests, and persisted outputs, making it usable as an actual product rather than only a demo. It’s also built to support an agentic workflow, where the system can refine outputs over multiple steps, bridging the gap between intent (“a bracket with four mounting holes”) and precise geometry.

OpenTakeoff is a free, Apache-2.0 quantity takeoff tool for construction estimating. Open a plan set (PDF, image or .zip), set the drawing scale, and measure - area, linear, count and deduct - with one-click room detection that traces a room when you click inside it. Apply waste percentages and supporting materials, then export quantities (SF, SY, LF, EA) as CSV or JSON. It runs entirely in your browser: no account, no upload, no server. Plans never leave your machine. What makes it different is who can run it. A person clicks the canvas; an AI agent calls the identical engine over the Model Context Protocol (npx opentakeoff-mcp, 35 tools) and gets the identical number, with the scale and origin of every measurement recorded. Built for Division 9 flooring by a working estimator, but the engine is general - drywall, paint, concrete, sitework. A free alternative to subscription takeoff tools such as STACK, PlanSwift, Bluebeam, Kreo and Togal.