The Polar Jukebox System (PJS) is a set of curses and console applications that allow you to manage huge amounts of MP3 files. It stores all information in a PostgreSQL database for fast and reliable operating. The tools include jplay (a Pine-like player with playlists and many sophisticated features), jrec (an audio CD to PJS converter), jfunc (commandline options for the PJS), jget (ssh-based tools for transfering CDs between PJSes), jdel, jimport, jexport, and more.
rebot3.pl renames MP3 files that you have grabbed from audio CDs with the track name, number, album, and/or artist. It does so by using either a remote CDDB server or a local CDDB created by cd (and other) players like xmcd, kscd or xmms. With rebot3.pl you can also add or remove ID3 (version 1) tags to/from the MP3 files.