Dropbox - Online Sync and File Sharing
Flickr - image and video hosting website
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
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.