Flickr may not be your first choice or even the best choice, but you can get free images for just about any category you could ever want. Be careful though, they do give photo authors the option to turn off downloading.
Believe it or not, this website is more than just generic wallpapers for your Windows PC. Microsoft’s image gallery has a great collection of free images that you can use for your blog or website that look awesome!
Aside from it’s seemingly gruesome name, Morgue File has some incredible free images to choose from. From the little bit of digging that I did, I found that some of this artwork is worth framing and hanging on your wall.
When I came across this site, I immediately noticed the quality of the photography available and free images available for use. While there are some “low skill” shots on this site as with others, there are some incredible pieces as well. This site does require you to register in order to download.
Stock.xchng requires that you register to use their photos, but once you do, you get plenty to choose from. In addition to their free images they also have a wide range of premium paid images to choose from.