JM is cool

A Windows 95-style desktop of experiments and toys, including Sigma, a puzzle that mashes crosswords and sudoku together. Open windows and poke around the little lab.

Tonble
Share X Reddit Bluesky Email
Screenshot of jm.cool

Stumble onto more like this

One click takes you to a page you didn't know you were looking for. Rate it and the next one lands closer to your taste.

Add to Browser — it's free

Works in Chrome, Edge and Brave. No account needed.