Using http://www.codeproject.com/Articles/19004/A-Simple-C-Global-Low-Level-Keyboard-Hook it's a simple application that runs in the system tray. Press f3 and f4 at the same time to close whatever is open. For when task manager is inaccessible, or a fullscreen game has frozen etc. Antivirus might flag this just because of the hook. No data is collected or sent anywhere. Download the standalone or installer, installer especially if you need .net framework 4 client profile.
Update 8/14/14
Reverted back to just handle closing processes with f3+f4, noticed system instability when changing Window workspace etc. ...