Product Disrupt might be a bit more popular than UI Guideline. We know about 1 link to it since March 2021 and only 1 link to UI Guideline. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I'm working on updating the list of references for http://uiguideline.com v2 Since there're many Design Systems and UI Libraries, it'll be an ongoing task. Here is the link to my work in real-time and in progress. - Source: Hacker News / 7 months ago
Product Disrupt - Curated List of Resources to Learn Product Design. Source: almost 3 years ago
uxtoast: Learn UX Design - Become familiar with design laws and learn how to use them.
Design Principles - An open source repository of design principles and methods
Uxcel - The easiest way to learn UX/UI design
Colorbox.io - Create accessible color systems 🎨
UX Challenges - Done reading about UX? Start doing it.
Checklist Design - The best UI and UX practices for production ready design.