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πŸš€ 15 Must-Know GitHub Repositories for Coders (Learning, Job Prep & Projects)

If you're a coder looking to level up your skills, prepare for interviews, or build solid projects, GitHub has a goldmine of free resources waiting for you.

Here’s a handpicked collection of 15 GitHub repositories that every aspiring and professional coder should know in 2025! πŸš€

1. freeCodeCamp πŸŽ“

free-project GitHub Name:

freeCodeCamp/freeCodeCamp

GitHub URL: freeCodeCamp

One of the biggest open-source coding education platforms. Offers thousands of hours of coding challenges, projects, and certifications β€” completely free!

2. The Algorithms - Python 🐍

the-algorithms GitHub Name:

TheAlgorithms/Python

GitHub URL: TheAlgorithms/Python

Want to master algorithms and data structures? This repo is a library of algorithms implemented in Python with easy-to-understand code examples.

3. EbookFoundation Free Programming Books πŸ“š

ebook-foundation GitHub Name:

EbookFoundation/free-programming-books

GitHub URL: EbookFoundation/free-programming-books

The most legendary repo β€” thousands of free books, courses, and tutorials on programming, web dev, AI, and more. Bookmark it!

4. Developer Roadmap πŸ›€οΈ

developer-roadmap GitHub Name:

kamranahmedse/developer-roadmap

GitHub URL: kamranahmedse/developer-roadmap

Clear visual maps that show you exactly what to learn step-by-step for becoming a Frontend, Backend, DevOps, or React Developer.

5. 30 Days of JavaScript πŸ“†βœ¨

30-days-javascript GitHub Name:

Asabeneh/30-Days-Of-JavaScript

GitHub URL: Asabeneh/30-Days-Of-JavaScript

A brilliant 30-day coding challenge that teaches JavaScript with exercises and mini projects. Perfect for beginners!

6. Build your own X πŸ› οΈπŸ§©

build-your-own-x GitHub Name:

danistefanovic/build-your-own-x

GitHub URL: danistefanovic/build-your-own-x

An exciting collection showing you how to build everything from scratch β€” your own database, blockchain, compiler, and even your own operating system!

7. Awesome Interview Questions 🎯

awesome-interview-questions GitHub Name:

DopplerHQ/awesome-interview-questions

GitHub URL: DopplerHQ/awesome-interview-questions

Curated lists of coding and system design questions asked in real interviews. A must-have for job seekers!

8. Project-Based Learning πŸ”₯πŸ’»

project-based-learning GitHub Name:

practical-tutorials/project-based-learning

GitHub URL: practical-tutorials/project-based-learning

The best way to learn is by building. Tons of project ideas categorized by tech stack (Python, JavaScript, Go, etc.).

9. System Design Primer πŸ—οΈ

system-design-primer GitHub Name:

donnemartin/system-design-primer

GitHub URL: donnemartin/system-design-primer

A lifesaver for anyone preparing for FAANG-level system design interviews. Explains how large systems are built with real-world examples.

10. Coding Interview University πŸŽ“πŸš€

coding-interview-university GitHub Name:

jwasham/coding-interview-university

GitHub URL: jwasham/coding-interview-university

A complete CS self-study plan to land your dream software engineering job. Designed by someone who actually made it to Google!

11. JavaScript Algorithms and Data Structures 🧠✨

javascript-algorithms GitHub Name:

trekhleb/javascript-algorithms

GitHub URL: trekhleb/javascript-algorithms

Serious about JavaScript? This repo implements data structures and algorithms using JavaScript β€” explained step-by-step.

12. App Ideas Collection πŸ’‘πŸ“±

app-ideas-collection GitHub Name:

florinpop17/app-ideas

GitHub URL: florinpop17/app-ideas

A list of app ideas divided by beginner, intermediate, and advanced levels β€” with project descriptions and features!

13. OSSU - Open Source Computer Science Degree πŸŽ“πŸ’»

ossu-computer-science GitHub Name:

ossu/computer-science

GitHub URL: ossu/computer-science

Study computer science like you’re attending MIT β€” but completely free, using OSSU curated open courseware.

14. Public APIs πŸŒπŸ”—

public-apis GitHub Name:

public-apis/public-apis

GitHub URL: public-apis/public-apis

A massive list of free APIs you can use to build amazing apps without building a backend yourself.

15. Awesome-Portfolio-Websites 🌟πŸ–₯️

awesome-portfolio-websites GitHub Name:

smaranjitghose/awesome-portfolio-websites

GitHub URL: smaranjitghose/awesome-portfolio-websites

Want to build a stunning portfolio? This repo shares templates, inspirations, and source codes for making professional portfolio websites.

🎯 Final Words:

  • Whether you’re a beginner, a job hunter, or a seasoned developer, these 15 GitHub repositories are pure treasure.
  • Bookmark them, practice daily, contribute if you can, and watch yourself grow massively as a developer. πŸš€
  • Remember: Consistency beats talent when it comes to mastering coding!