Sculpt a procedural island by painting oceans, valleys and mountains. Watch rivers reroute, tune rainfall and wind, and explore terrain lighting and tilt. Desktop recommended; temporary creations. Source: https://github.com/redblobgames/mapgen4 (Apache-2.0).

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.