EasyTAG is an utility for viewing, editing and writing easily and quickly the
ID3 tags of your MP3 files, using a nice GTK+ interface under linux. It
manages the ID3v1.x and ID3v2 tags (using id3lib) and offers a lot of
functions to manipulate them.

   - View, edit, write MP3 tags (supporting ID3v2 and ID3v1.x specifications)
   - Auto tagging: parse filename and directory to complete automatically the
     fields (using masks)
   - Ability to rename mp3 file from tag (using masks)
   - Process all mp3 of the selected directory and sub-directories
   - Ability to browse subdirectories
   - Recursion for tagging, removing, renaming, saving...
   - Can set a field (artist, title,...) to all other files
   - Read MP3 header informations (MPEG 1, 2, 2.5) and display them
   - Auto completion of the date if a partial is entered
   - Undo last changes
   - Ability to process fields of tag and file name (convert letters into
     uppercase, downcase, ...)
   - Ability to load a file for character translation
   - A tree based browser
   - Simple and explicit interface!
   - Menu bar and shortcuts

WWW: http://easytag.sourceforge.net/