WinRAP v1.0
If you don’t want your friends now what’s program you curently running, you can use this software. Named as WinRAP v1.0 (Windows Running Applications Protector), it allows users to instantly hide any running programs to prevent them from being seen by unauthorized third parties.
It’s very simple to use it. You even don’t need to install it. Just execute the program, and you can choose which programs you want to hidden. You can download it for free here : http://sourceforge.net/projects/winrap/files/WinRAP%20v1.0.zip/download