Red Vs. Blue (but I haven’t seen any of the episodes from season 9 yet)
KYM’s MLP: FIM page
Ponibooru (with explicit pictures filtered out)
City of Ponies Forums (specifically the Dev Digest and Community Digest sections, along with the Ponytector Server forum)
And couple of forums on Gamefaqs.
Aside from an old forum I check to keep in contact with some old friends, those are all the sites I check everyday (Apart from Equestria Daily, obviously).
Edit: I’m not responsible for any of the content found on the above sites, but BabyBlues is pretty PC!