Wallhaven - Your source for the best high quality wallpapers on the Net!
Pexels - Find the best free stock images about Browser Home Page. Download all photos and use them even for commercial projects.
InterfaceLIFT - High-resolution widescreen wallpapers, desktop icons, and themes for Mac OS X, Microsoft Windows...
Stock Up - The best free stock photos in one place
Simple Desktops - A collection of wallpapers designed to make your computer beautiful without distraction.
Unsplash - Unsplash is a website with high-quality free HD images. It has a catalog of more than three hundred thousand striking images that are neatly organized with tags. Read more about Unsplash.