PC-StayAwake - PC-StayAwake is a simple app to keep your PC awake, prevent screensaver from starting, and avoid app to change your status or availability.
Features
• Temporarily prevent Windows going to sleep.
• Temporarily prevent Windows turning off monitor.
• Simulate keyboard action to prevent screensaver from starting and avoid app to change your status or availability.
Download: 
PC.StayAwake.1.2.exe - 8.7 MB