Robocode - Robocode is a programming game where the goal is to code a robot battle tank to compete against...

LeetCode - Practice and level up your development skills and prepare for technical interviews.

CodeCombat - Learn programming with a multiplayer live coding strategy game.

Project Euler - Project Euler is a series of challenging mathematical/computer programming problems that will...

Colobot Gold - Colobot Gold is modified version of the original https://alternativeto.

CodinGame - CodinGame provides users with a fun and effective way to learn coding that eschews the rigid structure of traditional teaching methods.