The Foundation Center has published an appealingly designed, informative resource on human rights grant making around the world, mapping tens of thousands of grants by hundreds of foundations.
You can search the database by region, by issues/rights, by "populations" (meaning, for example, women & girls, human rights defenders, migrants & refugees) and by strategies (for instance "grassroots organising", "arts and culture", "litigation and legal aid"). The resource is reasonably up to date; data on the grants is from 2011 to 2015. More "qualitative" information has been posted up to late 2017, with promises for new updates in 2018.
Obviously, this resource is very interesting for those who who seek prospective donors. But its structure can also inspire those who wish to gain a structured overview of international human rights work - with the caveat, though, that this resource does not reflect the kind of work that does not get international funding.