SourceForge
GitHub
GitLab
BitBucket
openDesktop.org
Gitea
Launchpad.net
OSOR
Fun Learn
Duolingo
Pili Pop
Educational games for kids
Learn and play English
English AI
Train-Game.online
SpellingJoy
SourceForge
Fun LearnGitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Pili Pop - Great language learning method for kids
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
Educational games for kids - Learn the best online educational games for kids across different subject areas, including math, science, art, history and more.