http://freedesignresources.net/ High quality design resources for free. Crafted with love from amazing artists and professional designers around the world, ranging from fonts, mockups, graphic, template & more.
http://www.image-net.org/ ImageNet is an image database organized according to the WordNet hierarchy (currently only the nouns), in which each node of the hierarchy is depicted by hundreds and thousands of images. Currently we have an average of over five hundred images per node. We hope ImageNet will become a useful resource for researchers, educators, students…
http://www.chalkmotion.com/ ChalkMotion is a a collaborative library of simple hand drawn images and online presentation tool, designed to help visualize and share ideas.
http://kaboompics.com/ Great place to get breathtaking Free Pictures for business or personal projects.
http://www.uhdwallpapers.org/ HD Wallpapers. Desktop Backgrounds. 4K Images. Lots of Creative Commons and Public Domain CC0 Images.