Postedo - Simple Instagram scheduler that publishes for you
Gab - Gab is an ad-free social network dedicated to free speech.
Grum - Post on Instagram from your computer!
Friendica - Decentralisation - Privacy - Interoperability
InstaGhost - Upload photos directly from your PC to your Instagram account without needing your phone, schedule...
PixelFed - PixelFed is a federated image sharing platform, powered by the ActivityPub protocol.