Free Clipart sources

• http://classroomclipart.com/
  
• http://www.clip-art.com/
  
• http://office.microsoft.com/en-us/clipart/default.aspx
  
• http://www.clipart.com/en/
  
• Main Page - Open Clip Art Library Wiki
  
• Background: Open Clip Art Library - Wikipedia, the free encyclopedia