Ask HN: What is the most underrated GitHub repo you found lately?

I've recently started to browse Github for inspiration and see what others are building. I've found a lot of great repos that in my opinion are underrated and should receive some sort of promotion and sometimes some help in their code.

Here are the repos I've found lately (I am not affiliated in any way with any of them):

PHP Machine Learning Library: https://github.com/php-ai/php-ml

Laravel Ecommerce: https://github.com/ant-vel/antVel