Cool pages:

www.sonicgear.org I've been following this collection of sonic the hedgehog memorabilia for over a decade.
www.themeparx.com Theme park construction pics. I'm kind of obsessed with how theme parks are designed so meticulously to create the illusion of being in another world.
www.tcrf.net Cut content that never made it into the final release build of games.
www.myabandonware.com You probably know this one, games you can't buy.
www.11secondclub.com Monthly animtion competition where you get a random 11 second audio clip to animate.

Forums (because Discord is lame):

www.crimsondaggers.com Concept art forum
www.furrycorner.boards.net Furry forum
www.raymanpc.com A rayman forum, maybe I just like it because it's pirate themed...

RIP 🪦:

Xentax forum
Adventure Gamers forum
CGHub
Bionicle masks of power
Stage 9
Fighting is magic