Grain
grain.social is a photo sharing application built on the AT protocol. Users create galleries of photos, browse feeds, leave comments, and follow other photographers.
VisitGrain is an alternative to:
Flickr
Flickr is a photo-sharing and hosting platform for storing and sharing images.
500px
500px is a photography community and marketplace for discovering and sharing high-quality photos.
Instagram is a social media platform focused on sharing photos and videos.