w3schools - this saved my ass so much in school omg. great as a quick reference.
has stuff on HTML, CSS, JS, and lots more. (doesn't go too in-depth tho.)
website graphics
pixel safari - got some of winterspace's graphics from here and is a great resource in general
blinkies.cafe - blinkie stuff! has a decent selection of templates you can further personalize with custom text
miscellaneous
lumon-industries.com - if you're a fan of Severance you
might enjoy this. pretend you're in MDR working on something mysterious and important. Praise Kier!
voices of the void - a (horror) game where you look for signals from space. lots of fun, give it a go!