Need simple vector/raster program for testing

As a test bed for machines, we need a simple rendering program and rendering sample. Linux and Windows compatible programming environments would be best. Ease of use is of most importance as we are all testers and not programmers. A nod in the right direction would be greatly appreciated.

Thanks in advance!

No takers? Even a simple one word response would help us at least know where to begin to look.

thank you