The Open Clip Art Library is a collection of 100% license-free, royalty-free, and restriction-free art that you can use for any purpose.

This package contains much more clipart than the standard openclipart, but it is sorted by artist (who created the clip art) rather than by subject (e.g. sports).

This package contains the images in Scalable Vector Graphic (SVG) format, which is an XML format approved by the W3C.