EasyTAG is an utility to easily and quickly view, edit and write your audio
files' tags from a nice GTK+ interface.

Its main features include:
o View, edit, write tags of MP3, MP2 files (ID3 tag with pictures).
  FLAC files (FLAC Vorbis tag), Ogg Vorbis files (Ogg Vorbis tag).
  MP4/AAC (MP4/AAC tag), MusePack, Monkey's Audio files, Speex,
  and WavPack files (APE tag).
o Auto tagging: parse filename and directory to complete automatically
  the fields (using masks).
o Ability to rename files and directories from the tag (using masks)
  or by loading a text file.
o Process selected files of the selected directory.
o Recursion for tagging, removing, renaming, saving....
o Can set a field (artist, title,...) to all other files.
o Read file header informations (bitrate, time, ...) and display them.
o Auto completion of the date if a partial is entered.
o Undo and redo last changes.
o Ability to process fields of tag and file name (convert letters
  into uppercase, downcase, ...).
o Ability to open a directory or a file with an external program.
o CDDB support using Freedb.org and Gnudb.org servers (manual and
  automatic search).
o A tree based browser or a view by Artist & Album.
o A list to select files.
o A playlist generator window.
o A file searching window.