SoundCloudFS is a FUSE filesystem that allows you to mount SoundCloud streams as if they're local files. This allows you to play tracks in your favorite media player, and even easily open them with whatever software you'd like.
This program is a daemon that listens for connections to modify it's settings at run-time. If you would like a client to control it, check out scfscli
SoundCloudFS was written by Brian Murphy, and tested extensively by Chad Gould.