You don't need to use graphviz in order to use workflow, there's an HTML output alternative, though the graphical output is nicer.
There are also a bunch of static GIF files in the toolkit.
On my standard Linux box I see that Squid, Apache (mod_perl, mod_ssl), Mozilla, Grass, Latex, and Linuxconf all contain static GIF files. And the unofficial Linux penguin found in /usr/src/linux-2.4.8/Documentation is a GIF file ...
I would humbly suggest we have bigger fish to fry than to worry about this.
