For example, I would like to get my hand on some pearls. A simple way to do that is to trade with other civilizations or to increase my influence with some city-state; the problem is that I can never remember who has what resource, not to mention that can constantly change.
Right now I'm using the diplomacy screen to go over each civilization and each city-state manually, clicking on them to check what they have - that's 3 click per civilization, 1 click per city-state. Is there any easier way to do that?
Also I would be interested in anything that allows me to see how much gold each civilization helps, it would be useful when I have some extra resources lying around and what to get some gold out of it.