overGrive - Complete Google Drive desktop client for Linux
Flickr - image and video hosting website
Syncdocs - Syncdocs syncs folders between all your PCs and Google Docs.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
drive-cli - Google Drive client for the commandline
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.