Which RPG provides great useful resources?
There are three types of resources. There's additional material; settings, rules, maps, etc. There's things like GM screens, tokens, and 'toys' (miniatures, etc). There are things like character sheets, prep sheets (locations, items, creatures, adventure logs, etc).
Most one-shorts don't need much. They might have things like character sheets and tokens but many of them use blank paper or things you can easily find (like glass tokens from a hobby shop). Looking at Monsterhearts as an example, once you have your character sheet, you don't need much else in the way of resources. Although, I do like the idea of each character having a personalized token to share with characters with whom they have a tie.
On the other hand, a game like Pathfinder has maps, splat books, plastic miniatures, and paper miniatures for sale, as well as character folio (if you want more info than fits on a typical character sheet), GM screen and combat pad (to track combat initiative). And they sell adventures; one-shots, short campaign, and long campaigns. Those are all great if you have the money.
On the other hand, FATE and FAE have specialized dice for sale. There are also setting/adventure books. And there's lots of free or inexpensive content available.
And although I can't stand the system, I do have to give a shoutout to GURPS. Their background books are usually excellent. And they have a highly involved community who are very productive.
