It seems like every day there is a new Chinese camera accessory manufacturer and some have some excellent lenses for the price. Pixco makes a variety of accessories for X-Mount cameras, but they also make some interesting lenses and extension tubes.
Pixco 7.5mm f2.8
Pixo 60mm f2.8
AF Macro Extension Tube
I personally bought an inexpensive extension tube to learn with instead of Fujifilm’s official ones and they work pretty well. You can see more information about extension tubes for macrophotography here.
