Главоблъсканици

• http://www.pythonchallenge.com/
• https://cmdchallenge.com/
• http://guesshub.io/
• http://flexboxfroggy.com/
• http://cssgridgarden.com/
• http://notpron.org/notpron/
• https://vim-adventures.com/
• https://www.codewars.com/
• https://www.root-me.org/