Agar.io - The smash hit game! Control your cell and eat other players to grow larger! Play with millions of players around the world and try to become the biggest cell of all!

Gota.io - Improved agar.io with chat and custom skins

Senpa.io - Senpa.io is a massively multiplayer online action game created by the developers of Agar.io

Slither.io - Slither.io is a multiplayer online video game. Players control an avatar resembling a worm, which consumes multicolored pellets, both from other players and ones that naturally spawn on the map in the game, to grow in size.

Diep.io - Diep.io is a multiplayer action game available for web browsers, Android, and iOS, created by Brazilian developer Matheus Valadares. Players control tanks and earn points by destroying shapes and killing other players in a 2D arena.

Agar.io Clone - A simple Agar.io clone built with socket.io and HTML5 Canvas on top of NodeJS.