Shutterstock - Shutterstock is a provider of stock photos, illustrations, and vector art. The website allows individuals to purchase a subscription and download copyrighted art for creative projects. Read more about Shutterstock.
Flickr - image and video hosting website
Snapwire - Real photos by real people
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Pixabay - Over 270,000 free photos, vectors and art illustrations
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.