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Stack Overflow
Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Learn more . We <3 people who code. We build products that empower developers and connect them to solutions that enable productivity, growth, and discovery.
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Ask Ubuntu
Ask Ubuntu is a community-driven question and answer website for the Ubuntu operating system. It is part of the Stack Exchange Network, running the same software as Stack Overflow. Members gain reputation based on the community’s response to their questions and answers.
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Stack Exchange
Stack Exchange is a network of question-and-answer websites on topics in diverse fields, each site covering a specific topic, where questions, answers, and users are subject to a reputation award process. The reputation system allows the sites to be self-moderating.
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Codepen
CodePen is a social development environment for front-end designers and developers. Build and deploy a website, show off your work, build test cases to learn and debug, and find inspiration.
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SoloLearn
SoloLearn: Learn to code for FREE! courses; code playground; Discuss; top learners; blog; sign in. Learn to code for free! Interactive lessons, ‘on-the-go’ practice, peer support. Start Learning Now! I already have an account Python 3 Learn Python, one of today’s most in-demand programming languages on-the-go!
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Coursera
Join Coursera for free and learn online. Build skills with courses from top universities like Yale, Michigan, Stanford, and leading companies like Google and IBM. Advance your career with degrees, certificates, Specializations, & MOOCs in data science, computer science, business, and dozens of other topics.
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Udemy
Udemy, Inc. is an American massive open online course provider aimed at professional adults and students. It was founded in May 2010 by Eren Bali, Gagan Biyani, and Oktay Caglar. As of January 2020, the platform has more than 35 million students and 57,000 instructors teaching courses in over 65 languages.
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FreeCodeCamp
FreeCodeCamp is a donor-supported tax-exempt 501(c)(3) nonprofit organization (United States Federal Tax Identification Number 82-0779546) Our mission - to help people learn to code for free. We accomplish this by creating thousands of videos, articles, and interactive coding lessons - all freely available to the public.