GitHub is the number one platform for sharing all kinds of technologies, frameworks, libraries, and collections of all sorts. But with the sheer mass also comes the problem to find the most useful repositories.
Here I have created a list of the most valuable repos, that every developer should study, irrespective of where they are into their career journey.

Developer Roadmap

A lot of students and newbie’s (me included) in programming get confused about what path they should follow step by step to become a developer. This is a complete chart including the technology in each category of development (frontend, backend, DevOps..) that will give you a clear understanding of what you should learn next.

Awesome Python

This GitHub repository has included a list of awesome Python frameworks, libraries, software, and resources. You can also find resources for podcasts.

App Ideas Collection

Have you ever wanted to build something but you had no idea what to do?
This repos contains a list of app ideas categorized according to three tiers of programming experience.

Public APIs

If you are a developer then definitely you will have to deal with APIs for your application. Public APIs are a great list of free APIs that you can use for your projects and applications. It covers various topics such as business, anime, animals, news, finance, games, and more.

Awesome Cheatsheets

This is the cheatsheet of cheatsheets. This type of content, when well-crafted, makes your job easier as it becomes the aides-memoire for any dev daily tasks. As such it is a collection of cheatsheets for all popular programming languages, frameworks and development tools.

free-for.dev

This great repository was created to helping developers find software (SaaS, PaaS, IaaS) and similar offerings that have free tiers. Using great software for free? Sounds awesome!

30 Seconds of Code

This repository contains short JavaScript code snippets for all your development needs.
You should definitely take a look at this repository because it’s got some great solutions to recurring programming problems.

Conclusion

This is it! I'm hoping you will use those repos wisely to become rock star developers.