PulseAudio - PulseAudio is a sound system for POSIX OSes, meaning that it is a proxy for your sound applications.
TrueFire - The Best Guitar Lessons Online Fast. Easy. Fun.
PipeWire - Low-latency multimedia framework for Linux audio and video, supporting PulseAudio, JACK, ALSA and GStreamer applications
AudioBus - With Audiobus, the revolutionary new inter-app audio routing system, you can connect your...
QjackCtl - QjackCtl is JACK Audio Connection Kit Qt GUI Interface
Go Button - Go Button is a mobile audio app designed to provide professional playback of music and sound effects for live shows. It provides a creative, self-contained show control system that runs on your iPad, iPhone, or iPod touch.