Once upon a time, I clean up a table that my team refer to for HTML entities used in HTML, CSS, and Javascript. It became surprisingly popular and I haven't touched it in years, except for moving it to my family's Github account.

https://oinam.github.io/entities/

There are a few others, such as a tiny community informational site. People have made mobile friendly versions out of the website that I made, and the like. I gave that away, including the domain and the whole thing is now owned by that community.