I made gnometech.. it simple I take a magic item and make it look like a steampunk creation. Such as boots of jumping and springing has small rockets on the side of the bronze/brass boots with a gooey (super rubber) sole. I sometime up the rarity and combine two items together or give it some aspects of another item. Such as the rocket boots also allowing a swimming speed. 
Gnometech can also be just magitech and I do have Kobold, Goblins and Dwarves with their own variations.