Three.js

Verdict: The most widely used JavaScript library for 3D in the browser, used for web games and interactive scenes. Not an AI tool itself, but it is one of the libraries AI coding assistants and vibe-coding tools most often use when you ask for a 3D web game.

Free (MIT open source) · Official site: https://threejs.org · source checked 2026-10-22 (HTTP 200)

GitHub repo · ★ 117k stars (as of 2026-10-22) · More open-source AI

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