Steam Artwork Hub Essentials is an extension for Steam that allows you to upload long artworks, screenshots, workshops and guides.
https://steam.design/
16ROCK
https://emilianogioia.com.ar
https://steamdb.info
http://steamlevels.com/
IsThereAnyDeal
Skylark95
https://givee.club
ceifa
https://steaminventoryhelper.com/
https://premid.app/
Geku