Free Images

Imagebase:  Over 4 million images in a free downloadable database.
http://imagebase.davidniblack.com/main.php

Morguefile:  Public image archives for download. For creatives by creatives
http://morguefile.com

Wikimedia Commons:  A database of 11,469,650freely usable media files to which anyone can contribute.
http://www.commons.wikimedia.or

Pics4Learning.com:  A safe, free image library for education. Teachers and students can use the copyright-friendly photos and images for classrooms, multimedia projects, web sites, videos, portfolios, or any other project in an educational setting.
http://pics.tech4learning.com/

Flickr:  Share your life in photos. Upload photos to share with friends.
http://www.flickr.com/creativecommons/