Trn (a comprehensive system for managing long discussions which was used on usenet and was never rewritten for the web). I'm expecting an age difference on this one, not a gender difference.

Up-down karma vote histories.

However, I'm fine with anonymous voting. I think we'd get even more conflict and less good voting if votes had names attached to them.

Built-in polling would be excellent, preferably with some way of handling whether people's poll answers were correlated. I don't know whether most polling systems have this-- the only one I've used is livejournal, and it doesn't.