Turfjs / turf

A modular geospatial engine written in JavaScript and TypeScript

xiangechen / chili3d

A 3D CAD running entirely in the browser

thi-ng / umbrella

⛱ Broadly scoped ecosystem & mono-repository of 215 TypeScript projects (and ~185 examples) for general purpose, functional, data driven development

geoman-io / leaflet-geoman

🍂🗺️ The most powerful leaflet plugin for drawing and editing geometry layers

microsoft / maker.js

📐⚙ 2D vector line drawing and shape modeling for CNC and laser cutters.

JamesLMilner / terra-draw

A library for drawing on maps that supports Mapbox, MapLibre, Google Maps, OpenLayers and Leaflet out the box

w8r / martinez

Martinez-Rueda polygon clipping algorithm, does boolean operation on polygons (multipolygons, polygons with holes etc): intersection, union, difference, xor

mapillary / mapillary-js

Interactive, extendable street imagery map experiences in the browser, powered by WebGL

grizlizora / reverse-cad

⚙️ Industrial-grade pure TypeScript STL ➔ 100% Watertight Solid STEP AP242 B-Rep & CAD Features JSON engine with built-in MCP server for AI agents. Features exact Gauss-Mirtich 3D inertia, ISO threads (M2–M24), boundary unification (no extra lines), Zero-GC speed, DWRR concurrency & 5-gate RSVS reality verification across macOS, Linux, and Windows.