A high quality MP3 encoder
A free multi-track audio editor and recorder
Audio Tag Editor
Graphical editor software for many Boss and Roland effect & synth unit
Search, Download, Play, Share on Bittorrent and the cloud
Audio converter and CD ripper for various formats
Network transparent, client/server audio transport system
Streams many media formats with minimal configuration
Qt-based Multimedia Player
The X Jack Video Monitor
MIDI libraries for Qt/C++
Nyquist is a language for sound synthesis and music composition.
Quimup is a Linux client for MPD