Gronk is a Web-based MP3 jukebox. It generates heavily-hyperlinked Web pages listing all of your ripped CDs, by extracting information from CDDB data. These Web pages allow easy selection of songs or albums to play, and when nothing has been explicitly selected, it selects songs randomly. Playback is done via either XMMS or mpg123.
GtkSC is a GTK/Perl based application for viewing the list of streams available via SHOUTcast without waiting a long time for Netscape to draw the HTML tables. It will launch your favorite MP3 player and play the selected stream (provided you have an MP3 player capable of playing HTTP streams)
ID3.py is an object-oriented Python module for manipulating the so-called ID3 informational tags on MP3 files, which include such data as artist, track title, genre, et cetera. ID3.py is extremely easy to use, and is intended for folks who are developing MP3 encoder wrapper programs or browsers in Python.