Automuter is an application that stays in system tray notification area (near windows clock). It can mute speakers when computer is locked, when screensaver is running. Alternatively, you can set up you own silent time schedule or mute by hotkey.
IndieVolume allows every application have separate volume/mute level, independent from other applications volume/mute level. It allows per-application selection of playback device. It allows to mute any application when selected applcation is playing
Small software utility to make PC silent when it's turning on or is waking up. The sound is automatically muted when the computer is turning off or is going to suspend mode. The next system start generates no sound even if you forgot to turn it off.
Small software utility to make Mac silent when it's turning on or is waking up. The sound is automatically muted when the computer is turning off or is going to suspend mode. The next system start generates no sound even if you forgot to turn it off.
e2eSoft VSC is a Virtual Sound Card driver for your system, it works like a real sound card and you can use it to record or broadcast all the sound of your computer.
Prdesktop:better than a virtual desktop managers, that allows you to hide windows quickly and protect your screen from prying eyes. it is an all-in-one boss key tool that will instantly cover your current activity and mute sound.
Virtual Audio Streaming lets you Broadcast/Record/Connect all kinds of sounds, no matter whether the sound is from your PC or from online audios. It adds a virtual sound card on your system and becomes an enhancement of your real sound card.
PassMark SoundCheck is a Windows based application that allows users to test their PC sound card, speakers and microphone. Verify that your sound card can record and playback sounds at various audio sample rates.