Open-Source Knowledge. Like the above link about learning in public, the author encourages using blogging, speaking, presenting to open-source your knowledge as well as your tech.
Gateway Pages prevent PDF Shock. PDFs on the internet are still a rough experience and the author encourages alternatives to them.
Culture
What’s the best thing? Fun Tom Scott Project that compares things and shows you how you did against others.
Tech
sled.rs.An very thorough read on performance engineering within the context of sled, an open-source DB written in Rust.