Weapons
Katana: Longer and faster then sword
Mace: The kind that's a spiked hammer
Mace-Flail: Spiked ball and chain
Crossbow: Aiming system needed, but worth it.
Shuriken: Knives are a bit meh as far as throwing ability goes, why not some ninja stars
Tools
Rope: Put in a ragdoll engine and some loose rope and you can have a lot of fun. This could make whips possible too.
Scale: Different kinds of arrows for the cross bow. One has a harpoon type shaft and point with a rope. Shoot it over a wall and then pull it back to catch onto something and run up the wall.
[HUGE-RANT]
ARROWS + BOW. Different types, do want. Here's a few suggestions to start with. I already mentioned the scaling one.
Roped Arrow - Rope tied around shaft of two arrows. First is in crossbow, second in quiver. Shoot first to penetrate object/enemy. Shoot second to penetrate another. Imagine shooting one of these through the chest of a rabbit and killing him, then being able to hang his body from a tree or just shooting it and propelling him somewhere. Shoot the first arrow into a tree and fire the second at an enemy to pin them down at a position. Create traps by weaving webs of rope through this method.
Fire Arrow: An arrow with oil at the end that is light alight with a small torch or fire nearby. Imagine using the rope with this! Light a tree with the first and drag an enemy into it with the second! Use it to light traps you've set with the rope and create flaming webs!
Poison Arrow: A venom arrow. Very rare, shoot any enemy with it and they're guaranteed to die from the wound.
ROPE: This in itself would be amazing. Use tension and physic placements to create intricate designs and architectures. I'm gonna have to stop ranting here before my keyboard gets broken