https://arccalc.github.io/ help build a loadout and get a list of all the resources you need. Helps plan what you need to get, what you can sell and dont need, and makes it easy to make multiple backups of your gear.

https://metaforge.app/arc-raiders/market metaforge is a pretty good overall website, good for tracking quests, items, checking maps etc. but best of all is the marketplace. I have traded a few seeds for blueprints, project items etc.

https://maps.tcno.co/arc maps for arc raiders with tons of information on where to find stuff

https://arctracker.io/ similar to metaforge, I was using arctracker.io for a good while but ended up deciding on just using metaforge for now because of the marketplace

I think this is the site I normally like for quest guides https://www.gamespot.com/games/arc-raiders/guides/