codingame is a challenge-based training platform for programmers where you can play with the hottest programming topics. solve games, code ai bots, learn from your peers, have fun.

github is where over 100 million developers shape the future of software, together. contribute to the open source community, manage your git repositories, review code like a pro, track bugs and features, power your ci/cd and devops workflows, and secure code before you commit it.

your gateway to the digital world. learn, teach, and upskill in programming, web development, ai, design and more with code avengers

checkio - coding websites and programming games. improve your coding skills by solving coding challenges and exercises online with your friends in a fun way. exchanges experience with other users online through fun coding activities

a coding practice website for all programming levels – join a community of over 3 million developers and improve your coding skills in over 55 programming languages!

learn to code — for free

learn the technical skills to get the job you want. join over 50 million people choosing codecademy to start a new career (or advance in their current one).

stack overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.

well organized and easy to understand web building tutorials with lots of examples of how to use html, css, javascript, sql, python, php, bootstrap, java, xml and more.