Some time ago, I came across a levelset for SuperTux 0.1.3 which included some custom data, including music. It's called "Adventure to a New World" and can be downloaded here:
https://www.sendspace.com/file/nq9u10
I recognized some of the music as remixes of copyrighted music, but one that caught my attention was a short piece with the file name "factory.xm", given the title "Super Tux - Factory" in the audio "title" field. The title made me wonder if whoever composed this either had released it under a libre license like the GNU GPL, or intended to. But I can't find any trace of where it came from! The file's metadata doesn't indicate who composed it, and searching for it on DuckDuckGo and Google has yielded no results. What's more, I can't find any contact info for the person who made Adventure to a New World. All I could find was a YouTube channel, which only links to a Google+ page in the About page:
https://www.youtube.com/watch?v=i4f3Rgv5uiM
So, this is a shot in the dark, but does anyone know where factory.xm comes from?