volume

NATSpectrum

A nice small freeware tool to display live microphone input levels (meaning audio gain and frequency - the starting point for audio quality control in a gain structure), plus a mic volume and mute switch, and a headset volume level switch

http://sourceforge.net/project/showfiles.php?group_id=43372

Do you need a master administration tool for Windows volume control?

ZVolume Home 2006 is a nice, powerful replacement to the standard Windows volume and mute control (freeware).

It can be vastly customized, including changing its look using skins. It supports hotkeys and command-line parameters as well as all other functions the standard Windows volume control supports.