There is no way to play music from your iPod without syncing it
with iTunes, unless you can find a user generated program online.
However, you can put music from iTunes and your iPod on other
devices by following the steps on this website:
http://hubpages.com/hub/transfer-music-from-ipod-to-computer. Once
your music is on your computer, move the file from your computer to
the removable device you wish yo put it on.