I don't know who made these, and it's insanely difficult to find out. They're generally free for use on message boards. Just keep in mind that I didn't make these. I'm not skilled enough to make this stuff. (or at least too lazy to make them)
EDIT: Son of a..... never mind. The ASCII got horribly corrupted. It looked great in the preview, but when it was actually posted it was really screwed up.
Look into giant ASCII sometime though, it's great stuff.
ASCII: The rising art form.
Moderators: MetalBeast, Capm