Cat Bounce
cat-bounce.com
Cats. Bouncing around the screen. You can drag them or click to spawn more. There is no goal. The cats make sounds when they bounce off things.
Why it is useful
Occasionally you need a website that does nothing useful. Cat Bounce provides this efficiently and with excellent production values. The physics simulation is satisfying, the cat sprites are charming, and the sounds are exactly right. It has existed for over a decade and continues to serve its purpose. Share it with someone who takes the internet too seriously.