I play a whole bunch of things and in that sence I'm as much a (very) amateuristic musician as a collector.
I tend to be able to play everything a bit, but I'm not very good at any of them. Or well, I'm good enough to enjoy myself and a bit here and there for around the campfire but definately not good enough that it really would be worth anything to others.
So what would be on the list?
Drums (used to play a full set but now I only own a cajon), I do own a darbuka and a bodhran but can't really play either.
Didgeridoo, I haven't touched it in a long time but I can do the circulair breathing thing hah. With that, I have a tinwhistle lying around somewhere and my mom once got me a Susato Low D whistle because she liked the low sound better than the tinwhistle. I do know some rather nice tunes on it.
Then the strings, I started out with mandolin a few years back and that would be my main string officially, but these days I play guitar a lot more. I also bought a bouzouki earlier this year and I will build my own octave mandolin as my final project for school.
Can't really make a nice list with the makes because frankly, I wouldn't know from the top of my head.