Pics4Learning - good resource - pictures are difficult to locate
http://www.pics4learning.com

DK Multimedia - You must acknowledge DK multimedia.
http://uk.dk.com/static/cs/uk/11/clipart/home.html

http://www.doi.gov/gallery.html
(Department of Interior)

Discovery School Clip Art
http://school.discovery.com/clipart
no more than 10 - include "clipart licensed from the clipart gallery on DiscoverySchool.com"

Classroom Clip Art
http://classroomclipart.com
free - has watermark - must put "image provided by Classroom ClipArt"

Awesome Clip Art for Kids
http://www.awesomeclipartforkids.com

Weather Photos
http://www.photolib.noaa.gov

Stock Photos
http://freestockphotos.com
keep domain name

Free Fotos
http://freefoto.com
credit with a link

U.S. Photos
http://www.firstgov.gov/Topics/Graphics.shtml

Open Photo
http://openphoto.net/

Free Pixels
http://www.freepixels.com/

Free Photos Bank
http://www.freephotosbank.com/

Wise Gorilla Educational Clip Art
http://www.wisegorilla.com

http://www.backgroundcity.com
Backgrounds

Free photographs
http://www.free-photographs.net

Art and Architecture
Art Serve

Large college of Victorian style clip art
http://etc.usf.edu/clipart/index.htm

Every Stock Photo

Flickr-Storm
Allows you to save and get citations for pictures

Flickr
http://www.flickr.com/explore