Box Island: One Hour Coding - Charming mobile coding game (Hour of Code version)

CheckIO - CheckIO is a web site with a mission: To teach JavaScript and Python coding skills through a game-playing interface. It is designed to teach new skills or improve existing skills through completing challenges.

Goals & Challenges by Fini - A social way to gamify goals and habits with challenges

Boom.dev - Boom is the first competitive and gamified coding school, set up to empower the next generation of top software developers.

HabitScript - Gamify your coding time

Daily Coding Problem - Get exceptionally good at coding interviews