Clip Art Sources

American Booksellers Foundation for Free Expression.  Although there is a small cost for these posters, they are very good for use during Banned Book Week.  

Again, though not free, the photos and/or subscription to IStockPhoto is reasonable with thousands of photos.

TheFreeSite - Free clip art resources

Thousands of free photos and images on Microsoft Word

Census Bureau's Broadcast and Photo Services  ( Libraries may use these photos, but must credit the photographer.  Click on Photo Services.)

everystockphoto.com (A source for free photos.  Note:  After you sign in, it appears the "sign in" form keeps popping up.  However, if you go ahead and enter a subject for the photo you're looking for (e.g., library), it sends you on your way.)

Marketing Treasures and Library Clip Art (Chris Olson & Associates)

Library Media and PR  (Click on Tool Box on the left.)

Discoveryschool.com (A good clip art resource. Go under "Teachers." Look for "Clip Art" in the left sidebar.)