Volume2 - Volume2 is an advanced Windows audio mixer, a complete replacement for the standard Volume Control.
Sound Control - App-specific volume control
Power mixer - Power Mixer is a complete Windows volume control replacement.
SoundSource - The sound control that should be built into MacOS
Volume Scroll - Volume Scroll lets you control your main volume by hovering with your mouse cursor over the top...
3RVX - 3RVX is a skinnable volume display and controller.