You can only find this stuff by hitting random weblinks, really. The masters thesis of Chaim Gingold:
Comic Book Dollhouse (CBD) is an authoring tool and for making and playing simple interactive comics.
Scroll down for the Mac/PC downloads of the CBD software. Be sure to read the readme before plowing right in (the advice in there is short, but very useful).
Completely aside: I never seem to ever just randomly websurf to porn sites. With all the constant raving about protecting our kids from randomly finding sites that will harm their developing mind/soul, I've yet to have my random weblink following ever lead to such a site...