F-Stop Media Gallery - Image and video organizer.
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.
A Photo Manager - Manage local photos on Android: gallery, geotag with photomap, tags, find, sort, view, copy...
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.
LeafPic - LeafPic is a fluid, material-designed alternative gallery.
Piwigo.org - Manage your photo collection with Piwigo. Piwigo is open source photo gallery software for the web. Designed for organisations, teams and individuals.