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.

the missing package manager for macos (or linux).

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

sourceforge provides free & fast open source software downloads and development, and business software reviews and comparisons featuring the largest open source and business software directory.

q&a for ubuntu users and developers

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.

alternativeto lets you find apps and software for windows, mac, linux, iphone, ipad, android, android tablets, web apps, online, windows tablets and more by recommending alternatives to apps you already know.

the python package index (pypi) is a repository of software for the python programming language.