digiKam - Professional Photo Management with the Power of Open Source
Flickr - image and video hosting website
ACDSee Photo Studio - ACDSee becomes ACDSee Photo Studio — ACDSee Photo Studio Standard 2018 continues the ACDSee legacy
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Shotwell - Shotwell is an open source photo organizer designed for the GNOME desktop environment.
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.