#Android users, this one's pretty neat:
Blokada is a system-wide ad/content blocker for Android, slightly reminiscent of uBlock Origin. It does *not* require root, it's free software, and it's available on the F-Droid store!
I've been using it for the past few days, and it seems to be working well.
The instance by the group behind Razmjena vještina & the Hacklab in Mama, Zagreb.