Based on our record, UXmeter seems to be more popular. It has been mentiond 2 times since March 2021. 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.
Additionally to SUS, you could also use UXmeter's criteria: https://uxmeter.com/. Source: over 3 years ago
We've compiled plenty of examples at UXmeter. Source: over 3 years ago
The Web Design Handbook - Design Amazing Websites
Design Principles - An open source repository of design principles and methods
Calligraphy - Custom fonts for Android
Atlassian Design - Design, develop, and deliver
Ucraft - Ucraft is a drag and drop based website builder tool.
Facebook Design - Resources for Designers from the Facebook Design team