GabTag is a free and open source audio tagging application for Linux. It is released under GNU General Public License v3.0 and written in GTK 3. Using this audio tagging application, you can add, modify or delete audio tags like title, album, artist, cover tag, labels and genre. You can also find the tags and lyrics automatically by using MusicBrainz and lyrics wikia. It is simple and easy to use tool. It also supports multiple modification of audio files at the same time.