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.

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

a place where you find solutions in coding and programming for php, wordpress, html, css, javascript, python, c++, latex and much more.

build, analyze, and grow in-app subscriptions, and payments for ios, android, react native, flutter, unity, and web. implement in 20 minutes, no server code required.

katex – the fastest math typesetting library for the web