HideAll 

HideAll hides all your open windows at the press of a hotkey to help you surf/work privately you can restore them when you wish! It can also clear all your personal history lists (like history pages)!HideAll is a quality software at really low price!
hide windows show windows protect privacy clear history

BpmChecker 

Determine the tempo or BPM of a song or other piece of music by manually tapping along with the music, using your pc keyboard. Includes automatic missed beat detection, playing of a music file through your player and adding the bpm to the file.
bpm bpm tempo beat rate time detect detection tap tapping key keyboard check determine

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.
audio mixer windows audio mixer sound mixer power mixer volume control volume control replacement audio sound presets hot key bass treble osd utility