Flickr - image and video hosting website
Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
ImageShack - Unlimited space to host images, easy to use image uploader, albums, photo hosting, sharing, dynamic image resizing on web and mobile.
Dropbox - Online Sync and File Sharing