ClassroomClipArt.com and All-Free-Download.com offer extensive libraries of free clip art. Other sites, such as GraphicStock.com, allow free downloads for a limited amount of time. After the initial trial period, a paid membership is required to continue using the library.
ClassroomClipArt.com has an extensive library of images that it allows users to download for free. The images are divided into categories and subcategories, and the image gallery is searchable. This site offers photographs, animated images and GIFs.
All-Free-Download.com primarily offers animated images, and it divides images into categories. It also allows searches for specific image types.
ClassroomClipArt.com and All-Free-Download.com both offer unlimited downloads for free. AllFreeClipArt.com offers unlimited downloads of its images, but images are limited to animations.