Главоблъсканици

• http://www.pythonchallenge.com/ The first programming riddle on the net.
• https://cmdchallenge.com/ Web application that presents small shell challenges.
• http://guesshub.io/ GIT guessing game.
• http://flexboxfroggy.com/ Help Froggy and friends by writing CSS code.
• http://cssgridgarden.com/ Write CSS code to grow your carrot garden.
• http://notpron.org/notpron/ The hardest riddle available on the ineternet.
• https://vim-adventures.com/ Learning VIM while playing a game.
• https://www.codewars.com/ Improve your skills by training with others on real code challenges.
• https://www.root-me.org/ The fast, easy, and affordable way to train your hacking skills.
• https://www.codingame.com/ The new way to improve your programming skills while having fun and getting noticed.
• http://www.codeschool.com/ The interactive learning destination for aspiring and experienced developers.
• http://pcottle.github.io/learnGitBranching/ Learn GIT branching by playing the game.