Codeeval!

A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots and collaborate to solve real-world challenges.

Duel with friends and foes in head-to-head programming battles!

Achieve code mastery through challenge.Improve your skills by training with others on real code challenges

CheckiO is expanding the world’s code literacy through gameplay.

Kattis helps companies make safer recruitments and attract the best developers with its dynamic challenge platform.

VIM Adventures is an online game based on VIM's keyboard shortcuts (commands, motions and operators). It's the "Zelda meets text editing" game. It's a puzzle game for practicing and memorizing VIM commands (good old VI is also covered, of course). It's an easy way to learn VIM without a steep learning curve.You play a blinking cursor appearing one day in a semi text based world of Textland inhabited by little people but ruled by bugs. You soon discover that your arrival was foretold by an old prophecy and that you're expected to restore order to the world (in case you didn't make it to level 2 yet...). »

At Geektastic we help our client's thoroughly evaluate their future talent using our unique peer reviewed code challenge platform. We believe a candidate is worth more than a score and the only way to thoroughly understand how suitable they are to work in your team is to have a human look over their code. The platform allows clients to license code challenges from our portfolio or upload their own, they can also choose to have our on-demand team (of exceptionally talent software engineers) carry out the thorough review or perform it in-house. »

Screeps is a massive multiplayer online real-time strategy game. Each player can create his or her own colony in a single persistent world shared by all the players. Such a colony can mine resources, build units, conquer territory. As you conquer more territory, your influence in the game world grows, as well as your abilities to expand your footprint. However, it requires a lot of effort on your part, since multiple players may aim at the same territory.