Piwigo.org - Manage your photo collection with Piwigo. Piwigo is open source photo gallery software for the web. Designed for organisations, teams and individuals.
fgallery - fgallery: a modern, minimalist javascript photo gallery
PhotoPrism.app - PhotoPrism® is an AI-Powered Photos App for the Decentralized Web. It makes use of the latest technologies to tag and find pictures automatically without getting in your way. You can run it at home, on a private server, or in the cloud.
ProGram - CLI based, self-hosted Instagram-esque gallery
Picaboo - Picaboo is a web-based image publishing and printing service that allows you to create personalized photo books, cards, and scrapbooks.
Google Photos - All your photos are backed up safely, organized and labeled automatically, so you can find them fast, and share them how you like.