LilyPond sheet music text editor
The fre:ac audio converter project
System-wide PC Audio Equalizer and Effects app for Windows 7 to 11
Alternative GUI for Equalizer APO -- 1 or 2 user listening sessions
A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 / 11
A high quality MP3 encoder
A free multi-track audio editor and recorder
Burn optical discs in various formats
Audio Tag Editor
Graphical editor software for many Boss and Roland effect & synth unit
Free media player with support for Youtube
Search, Download, Play, Share on Bittorrent and the cloud
Audio converter and CD ripper for various formats
Multi-Format Audio-Encoder Front-end
MuldeR's OpenSource Projects
Multiplatform GUI of MP3Gain which adjusts volume of MP3 files
A utility to convert a Flac library to MP3, Opus or Ogg Vorbis format.
Turn your PC into a very advanced MediaCenter/HTPC
JACK Audio Connection Kit Qt GUI Interface