Livetraker Audio Midi Player - LiveTraker is a audio / midi / text player specifically designed for live performance on stage
Linux Show Player - Sound player designed for stage productions
Jingle Palette - Jingle Palette application was designed to be an instant jingle player for radio broadcast studios.
QLab - QLab, Live show control for Mac OS X.
Soundplant - Play sound files with the computer keyboard
Trigger Audio and Video Playback - Audio and video cue player for broadcast and live performance.