Check out this pretty neat website, TakingITGlobal.
It was one of the earliest social media websites, made in 1999! You can look through groups and projects centered on world issues. The website is mostly aimed at young people.
I’ve never heard of this before, but it seems like the kind of thing that should be more widely known about in activist spaces…
[UPDATE: the twitter feed is active, but I haven’t found any groups that are recently active. Not that the search feature seems capable of specifically finding recent activity… I still think some kind of website/organization like this has a lot of potential, though. And they do have links to educational material and stuff…]