TrueFire - The Best Guitar Lessons Online Fast. Easy. Fun.
EarTrumpet - Volume Control for Windows
AudioBus - With Audiobus, the revolutionary new inter-app audio routing system, you can connect your...
Sound Control - App-specific volume control
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.
Power mixer - Power Mixer is a complete Windows volume control replacement.