I Cant Believe It has compiled a pretty cool list of unusual weapons to look over. It has only one that I recognized, the Man Catcher, as I've used it from time to time in the game, learning of it in Gary Gygax's World Builder.
Its interesting to note that a number of these would be utterly useless against someone in heavy armor. Having read a great deal recently about the Religious Wars between Turkey/Islam and the Spainish Emmpire/Papacy the heavy armor preferred in the west cannot be overstated.
Check em out here.