Blunt Weapons
Flail
The old ball and chain. A handle with one or more chains attached to it connecting to one or more metal weights, usually spiked.
Mace
A very simple bludgeon, while it can be decorative, all it really is is a stick with a heavy metal weight at the end. The weight typically spiked or flanged to make it hurt all the more.
Nunchucku
A martial arts weapon. The nunchucku is simply two handles tied together with a chain or sturdy cord.
Tonfa
Another martial arts weapon with simple design. The tonfa is a length of wood or metal a little longer than one's forearm. It has a handle attached to it perpendicular at one end so it can be griped providing some blocking power to the user's forearm as well as allowing them to punch with it or swing out the longer end.
Warhammer
The warhammer follows a similar design to a battle axe except it is blunt. It is a long handle, weighted at the end with a hammer head on one side and either another hammer head or spike opposite it.