(Updated March 2013)
BigFoto – Free download of all pictures with a link or reference. Most photos from amateur photographers from around the world.
Cash Journal – List of the top 12 free image sites. Some require registration and some images require attribution, while others do not.
deviantART – A site for artists to display their works. Some are nice enough to license under CC for your use.
Flickr Creative Commons search – Search Flickr for all the derivatives of the Creative Commons licensing.
FreeDigitalPhotos – Download free and premium stock photos and illustrations. These professional, royalty free images can be used in business and personal design projects.
FreeFoto – Over 100,00 free stock photos.
FreeMediaGoo – Free images, free stock photos and background images ready to download. No registration required.
MorgueFile – The MorgueFile free stock photos for your inspiration, reference and use in your creative work.
Open Clip Art Library – An archive of free-to-use clipart numbering around 11,000 pieces. All clipart is released to the public domain and may be used in any project for free with no restrictions.
Photo Pin – Search millions of Creative Commons photos from Flickr and add them to your blog posts easily.
Photo Rogue – You can request a picture of anything you want, and volunteer photographers will go out and attempt to actually take the picture you want. It’s entirely free.
PicSearch – Search the web for images. An image search service with more than 3,000,000,000 pictures.
Stock Photography Site – Huge gallery of high quality royalty-free stock photos.
Stock Photo Search Engine – Indexes over 1.4 million Creative Commons photos for your use.
Travel Stock Photos – A travel & tourism photo site offering 3000+ free, travel-themed stock-images ready for instant download.
Wikimedia Commons – A database of over 16 million free-use images, sound and other media files.