Ex Falso is a tag editor with the same tag editing interface as Quod Libet. It lets you display and edit any tags you want in the file, for all the file formats it supports.

Supported file formats include Ogg Vorbis/Opus/Speex/FLAC, MP3, FLAC, MOD/XM/IT, Musepack, Wavpack, MPEG-4 AAC, Monkeys Audio, WMA, SPC, MIDI.