Over 3800 high-resolution textures and images available for free download.
http://mayang.com/textures/

Now owned by Getty Images, Stock.XCHNG is the leading fee stock photo website.
http://www.sxc.hu/

Stock photography community providing high quality stock photos. Free photos added weekly.
http://www.dreamstime.com/

Free photos in several categories, also searchable by keyword. The images are available in high resolution and public domain.
http://imagebase.davidniblack.com/

Lots of free stock photos and images. It's a bit tricky at first because sponsored listings to external sites are mixed in with the results, but once you figure out how it works, it's fine.
http://www.stockvault.net/

123RF.com is your one-stop royalty-free photo library offering stunning, practical stock photos at the most affordable price! More than 15,000 new images added daily! If that's not enough, check out our daily dose of FREE images! Take your pick. Download. Absolutely on the house.
http://www.123rf.com

Pictures for business, Colorado stock photos image downloads for personal or business use.
http://www.northerncoloradophotography.com/

Public image archive for creatives by creatives.
http://www.morguefile.com/

High quality stock agency for selected budget photography. Shotshop’s online shop offers high quality royalty-free images from all areas and is well known for its simplicity and ease of use.
http://www.shotshop.com/