An mindblowing new chipmusic player has appeared. From the trusty SID to obscure tracker formats, Chipmachine supports nearly every format and platform you can ask for, including all 322 formats currently supported by the Modland archive. It also serves as a frontend to latter collection as well as HVSC, and can read and display STIL tags.
Chipmachine is rather heavy on dependancies (I had to install some 300 MB of stuff on my machine), but I think considering the feature set, it's worth it.
Anyway, check it out here. For the time being, you'll need to build Chipmachine from source. Unless you happen to use Ubuntu 64bit, in that case there's a .deb package available.