GitHub repositories to improve skills

1. Free Programming Books
Freely available programming books
182k ⭐
Repo: https://github.com/EbookFoundation/free-programming-books
2. Coding Interview University
A complete computer science study plan to become a software engineer.
162k ⭐
Repo: https://github.com/jwasham/coding-interview-university
3. Awesome
Awesome lists about all kinds of interesting topics
158k ⭐
Repo: https://github.com/sindresorhus/awesome
4. Developer Roadmap
Roadmap to becoming a web developer in 2020
154k ⭐
Repo: https://github.com/kamranahmedse/developer-roadmap
5. Public APIs
A collective list of free APIs for use in software and web development.
117k ⭐
Repo: https://github.com/public-apis/public-apis
6. JavaScript Algorithms
Algorithms and data structures implemented in JavaScript with explanations and links to further readings
103k ⭐
Repo: https://github.com/trekhleb/javascript-algorithms
7. Awesome Python
A curated list of awesome Python frameworks, libraries, software, and resources
95.7k ⭐
Repo: https://github.com/vinta/awesome-python
8. Node Best Practices
The Node.js best practices list
63k ⭐
Repo: https://github.com/goldbergyoni/nodebestpractices
9. Real World
“The mother of all demo apps” — Exemplary fullstack Medium.com clone powered by React, Angular, Node, Django, and many more
56.8k ⭐
Repo: https://github.com/gothinkster/realworld
10. Tech Interview Handbook
Materials to help you rock your next coding interview
51.4k ⭐
Repo: https://github.com/yangshun/tech-interview-handbook
11. Clean Code JavaScript
Clean Code concepts adapted for JavaScript
49.1k ⭐
Repo: https://github.com/ryanmcdermott/clean-code-javascript
12. Free For Dev
A list of SaaS, PaaS and IaaS offerings that have free tiers of interest to devops and infradev
46.2k ⭐
Repo: https://github.com/ripienaar/free-for-dev
13. Awesome For Beginners
A list of awesome beginners-friendly projects.
29.5k ⭐
Repo: https://github.com/MunGell/awesome-for-beginners
14. Javascript Questions
A long list of (advanced) JavaScript questions, and their explanations.
30.9k ⭐
Repo: https://github.com/lydiahallie/javascript-questions
15. OG AWS
Amazon Web Services — a practical guide
29.2k ⭐