Well, back in the day, the first heliopoleis (siege towers) were pretty damn strange weaponry!

But, with hindsight: the exaggerated form of the Turkish kiliç (now commonly known, and shown -- read: in Hollywood -- as the scimitar) and the bigger two-handed weaponry from India are pretty strange weapons.

And, oh, the staff mace from China. And those dual swords with hooks at the ends with which you could disarm your opponnent (both showcased in Crouching Tiger, Hidden Dragon).