Zapper descriptions?

Is there a site anywhere, like an idiots guide which has a list of all the different Zappers and the basics of how they differ from each other and what benefits they have?
I already own a couple of Clark Zappers and a Terminator but I am interested in trying some of the others too... Some Zappers are sounding quite complicated though, it would be handy to have a basic list.

~ Jowanna.