Power Mixer 

Power Mixer is a complete Volume Control replacement that lets you easily change the sound volume by simply rotating the mouse wheel or by using hot keys. It includes an audio mixer, a scheduler, OSD, command line support, customizable presets.
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VolumeTouch 

A freeware replacement utility to replace the Windows speaker icon. Controls the master volume. Supports various keyboard and mouse shortcuts. Supports mute/unmute, access to andvanced controls, skins and more. Easy configuration.
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