ImgShare.io can be used to host images and albums. Very quick interface and loads images very fast.
imgbox - Imgbox is a free image hosting service.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Flickr - image and video hosting website
PostImage.org - Provides free image upload and hosting integration for forums.
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.
ImageShack - Unlimited space to host images, easy to use image uploader, albums, photo hosting, sharing, dynamic image resizing on web and mobile.