There is just one: “GPL”. I’m not aware of any other viral licenses. But I suspect you’ve meant copyleft instead, which is something different from virality - there are plenty of copyleft licenses, eg MPL, which are not viral.
Maybe that's what I was looking for. FFS, way back in the mists of time I'm pretty sure I had a hat that read "COPYLEFT". You'd think I'd be able to get it correct.