Flickr - image and video hosting website
A Photo Manager - Manage local photos on Android: gallery, geotag with photomap, tags, find, sort, view, copy...
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
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.
Camera Roll - Simple Gallery App for Android, with lovely Material Design.