PixelFed - PixelFed is a federated image sharing platform, powered by the ActivityPub protocol.
Picaboo - Picaboo is a web-based image publishing and printing service that allows you to create personalized photo books, cards, and scrapbooks.
Gab - Gab is an ad-free social network dedicated to free speech.
Juicebox - Spectacular HTML5 Image Galleries Made Easy
Friendica - Decentralisation - Privacy - Interoperability
novaGallery.org - Beautiful php image gallery - easy to use, with modern responsive design, private mode, themes, languages