Maybe it's a tangent, but Overleaf is hands down one of my favorite services.

It follows UX designer, Bret Victor's suggestion that creators need to be able to see what they're creating. It also has a ton of convenient features like forking, auto-saves, and inviting people to edit through private links without requiring that your collaborators sign up for an account on Overleaf.

LaTex creates beautiful documents, but it was too difficult for me to use before Overleaf. Also, I only use the free version of Overleaf.

Thank you for creating Overleaf!