How about something that makes me able to resist any effect I dont like, heals me in the process and damages my opponents?
A case for crafting materials (that can only hold a certain type specifically skins/bolts/billets/blocks) along the lines of pouches for gems or cases for scrolls.
I dont know about any other would be smiths but I have three sacks full and something a little more space economic would be dandy.
Something similar in form and use to kits that restores vitality. Pricey, though.
Sheaths that dont look like sheaths, a boot you can sheath a dagger in, a bodice. they wouldnt even need to be magical. Alternatively, a quiver that can hold many more arrows, something that looks/weighs like a dagger sheath but it can hold any size weapon a 'sheath of holding' so to speak. Something I made on another mud, gloves that were a magical sheath. You would wear them and the weapon you held would disappear into an extradimensional space, reappearing at will. (just used the normal 'sheath' and 'draw ' commands, codely it was just a normal sheath)
a backpack I can wear, damnit.
pants with pockets
a rocketpack? Nah.