ShareDrop - HTML5 clone of Apple's AirDrop - easy P2P file transfer powered by WebRTC
Flickr - image and video hosting website
SHAREit - SHAREit allows you to transfer files and data from your phone to another device without having to rely on WiFi or a data plan.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Warpinator - Share files across the LAN. Contribute to linuxmint/warpinator development by creating an account on GitHub.
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.