Qoobar
Qoobar is a free and open source, multiplatform program for editing tags in classical music files
MakeMKV
MakeMKV is a free multiplatform DVD and Blu-ray to MKV converter and network streamer
Harmonoid
Harmonoid is a free and open source, cross-platform program for playing local and music from YouTube
Reco
Reco is a free and open source simple audio recording application
Rhyme
Rhyme is a free and open source, multiplatform, simple and convenient music player
NTag
NTag is a free and open source, multiplatform audio file tag editor focused on everyday use cases
GabTag
GabTag is a free and open source program for modifying and autocomplete audio file tags
File Shredder
File Shredder is a free and open source program for securely deleting your files