github is where people build software. more than 100 million people use github to discover, fork, and contribute to over 420 million projects.

stack overflow | the world’s largest online community for developers

a git gui that offers a visual representation of your repositories. sourcetree is a free git client for windows and mac.

atlassian's team collaboration software like jira, confluence and trello help teams organize, discuss, and complete shared work.

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.

a computer science portal for geeks. it contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview questions.

jetbrains is a cutting-edge software vendor specializing in the creation of intelligent development tools, including intellij idea – the leading java ide, and the kotlin programming language.

make the impossible, possible with trello. the ultimate teamwork project management tool. start up a board in seconds, automate tedious tasks, and collaborate anywhere, even on mobile.