EarTrumpet - Volume Control for Windows
Kingshiper Vocal Remover - Kingshiper Vocal Remover for Mac is a powerful and easy-to-use tool that separates vocals and instruments from music. It also can be used to remove vocals and background noise from video effortlessly.
Volume2 - Volume2 is an advanced Windows audio mixer, a complete replacement for the standard Volume Control.
VocalRemover.org - Vocal Remover and Isolation. Separate voice from music out of a song free with powerful AI algorithms
Volumouse - From authors website:
Gonimo - gonimo is an open source cross-platform baby monitor.