I admit this is pretty damn niche but it might be useful for a couple of folk. A patch/bank editor for the Yahama FB01 appeared on sourceforge fairly recently and the stable version came out a couple of days ago. The only documentation thus far is in French but Beware and myself both have FB01 units and the editor up and running and are slowly working out the functions.
The FB01 is interesting cause it has a YM2164 chip which is very very similar to the YM2151 sound in some of the Japanese earlyish computers like the X68000 and Sharp X1. Said computers are hard to find, expensive and very sparsely documented in English. The FB01 on the other hand is cheap as chips and common as hell. The only downside to it was that the (I think) only editor was for the ST. Hopefully this editor will make the machine an interesting option for people.