dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
Flickr - image and video hosting website
Rdfind - Rdfind is a program that finds duplicate files.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Czkawka - Multi functional app to find duplicates, empty folders, similar images etc.
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.