NoSleep is a FREE utility which allows you to deactivate sleep, standby and screensaver on your computer temporarily.
This small utility can be really useful at times when you need to deactivate the screensaver or prevent your computer to enter standby or sleep mode when you are doing some important works and you may need to switch in between different computers around you.
The most amazing feature of this program is that you disable and enable the screensaver, disable and enable standby and sleep from system tray just in one single click.
Some additional features of NoSleep includes the following shown in the image below.
You can turn on and off screensaver, standby and sleep mode of your computer just by a single click on the program icon in system tray.