@Inadequate
Now that you mention wanting some more unusual weapons, this feels like a good time to mention my latest idea;
The Endothermic StunBlade!
The basic idea is some crazy person (me) found a Heat drain bionic and a Electroshock Unit bionic lying around, and said "I don’t want to cut myself up to use these, so I’ll weld them to this sword instead!"
This bizarre weapon has two modes, “Drain” and “Shock”.
In “Drain” mode, striking a warm-blooded target absorbs their body heat, adding cold damage, small slowdown, and stores the resulting energy in the weapon.
In “Shock” mode, striking a target expends some of the weapons energy to shock the target, adding electrical damage, and stunning them.
The blade may also have a few other internal tools that can be powered by the stored energy, like a flashlight and a soldering iron. By the way, this item doesn’t use batteries; the ONLY way to power it is to bean something over the head with it.
I may also make a large, hammer-version of this that has an odd twist; It doesn’t have any shock damage parts, but it DOES have a very large energy storage capacity, and also standard UPS connections. Basically, it’s a UPS that you charge by beating people with it!
I know these sound a little out-there, but they’re really no more odd than the bionics they’re constructed from, IMO.