Auogg is a simple and straightforward Ogg/Vorbis player for NAS. It's based on libaudio, libvorbis and libogg, and relies on Argp facility of the GNU C Library. As a result, it's really tiny (about 13 KiB C source and about 11 KiB compiled binary.)
Feel free to add message translation (i. e. gettext) catalogs. Most of the strings are, actually, appropriately marked and the necessary functions are called from main (), but I haven't tested whether it really works.
Ivan Shmakov <ivan@theory.asu.ru>