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
Google Photos - All your photos are backed up safely, organized and labeled automatically, so you can find them fast, and share them how you like.