Visit playspinward.com (opens in a new tab)Spinward is a browser tool for designing O'Neill cylinder space colonies. Pick the cylinder's size and star, paint streets with brushes (grid, radial, hex, old town and more), fill the blocks with buildings, parks, landmarks, rivers and farms, then walk, fly a drone or VTOL, or ride transit through your city. Twelve preset colonies are there to visit, plus a torus mode. Built on three.js and WebGL 2; work is saved in your browser. Building needs a desktop. Free, no sign-up required.
Meet the team
Hunted by Ilyas. The makers are not on 25launches yet.



