Audio tag editors

Puddletag is a free and open source, powerful yet simple audio tag editor for Linux

Picard – free and open source cross-platform music tagger/audio tag editor that helps in identifying and organizing the digital audio

Kid3 – free and open source cross-platform audio tag editor for many audio file formats

EasyTAG is a simple free and open source application for viewing and editing tags in audio files and works under Linux or Windows