Cue Player - Cue Player software for theater sound and lighting
Kontakt - With KONTAKT 6, you can sound like a snare drum, a symphony orchestra, or anything in between, from a universe of sampled instruments.
Linux Show Player - Sound player designed for stage productions
UVI Falcon - Sampler/synth hybrid instrument
Trigger Audio and Video Playback - Audio and video cue player for broadcast and live performance.
Pianoteq - Pianoteq is a virtual piano that runs on your computer.