Apetag is command line tagging tool for music files such as Monkey's Audio and Musepack using the APE 2.0 standard.
Ex Falso is an audio tag editor for GTK+. Supported formats include MP3, Ogg Vorbis, FLAC, Musepack (MPC), WavPack, and MOD/XM/IT.
The key-tools software is used to automatically analyse and tag the key of music files. Its primary use is to help DJs catalog a music library.
Musicbox is a simple one-file-at-a-time audio tag editor. It can edit ID3, Vorbis and FLAC tags via the TagLib library.
taggrepper is a small tool written to ?grep? tags of media files. Currently, it can be used to match some or any tags of Ogg Vorbis and MP3 files against specified regular expressions. It supports recursive searches as well.