I've been looking at the VIC-20 recently, and I want to know if there are any )good) trackers for it.

As far as I know there are still only 3 full ones:

Fisichella by Aleksi Eeben.  Runs on unexpanded machines.
Vic tracker by Daniel Kahlin.  Needs 16kb+ expansion memory, though completed songs run on unexpanded machines.
There's also a port of GRG's "Sid Duzz' It" called "Vic Duzz' it" or something?   Dunno where that is online though.   Again I think that needed expansion memory to run.  Sounded pretty good.

Oh, if I ever finish this there'll be a cross-platform one that supports Viznuts's wave effects.  Or you can use the source code right now.