Aside from being a dynamic play-around-with-mathy-stuff kind of tool, GeoGebra also has an export feature that allows you to create images. These exported images can be pasted into another program, such as Word (for inclusion in a test, perhaps), or one of my favorites: GIMP. Today I created a basic graph of a cubic function, exported the image, pasted it into GIMP, saved it as a JPEG, and viola:
Instant art.
Can you believe this is all free?
Learning to Teach 