EarTrumpet - Volume Control for Windows
Volume2 - Volume2 is an advanced Windows audio mixer, a complete replacement for the standard Volume Control.
Volumouse - From authors website:
WALE - Windows Audio Loudness Equalizer Wale calculates appropriate volume of each app in real time from app's average peak level and try to equalize peak levels of each app to desired level.
KMix - KMix is an application to allow you to change the volume of your sound card.
Volume Scroll - Volume Scroll lets you control your main volume by hovering with your mouse cursor over the top...