tldraw
Infinite canvas whiteboard-app + SDK. Open source. Berömt 2023 "tldraw makes real" demo: rita UI → få fungerande webbsida via GPT-4 Vision.
Steve Ruiz utvecklade, samma författare som perfect-freehand. SDK:t (tldraw library) embedds canvas i din app — used by Mozilla, Vercel, Hugging Face Spaces. Multiplayer via Yjs eller egen sync-engine. Konkurrenter: Excalidraw (mer enkel + ikonisk sketch-look), tldraw är mer feature-rik. Vibrant developer community runt sync, AI-integrationer.