This is a wonderful resource. There are a ton of amazing Sharealike 3.0 images out there, and sites that let you search them (like http://www.compfight.com http

This is a wonderful resource. There are a ton of amazing Sharealike 3.0 images out there, and sites that let you search them (like http://www.compfight.com http://www.compfight.com) but this is the only decent platform I've seen for finding CC0 licensed images which is great if you want to use high quality images without having to add attributions to your pages that use them.