Caffeine Software Keep Computer Awake. Licence is GPLv3 as at bitcoin block 0000000000000000001b34dafd32802dd18c0303c73b2af6b1969be7c9bbccbe. It is more of a tradition I guess than something that I cannot live without though.
Caffeine is a free and portable tool which can prevent your PC from going into sleep mode. Caffeine Prevent your computer from going to sleep If you have problems with your PC locking or going to sleep caffeine will keep it awake. Caffeine is a very simple program designed to accomplish one task and one task only.
Every 59 seconds it simulates the press of the F15 key to keep your machine out of screensaverstandby mode.
In other words it tricks the computer into thinking you pressed a key on your keyboard. When the coffee maker is full the application is activated. I need a good strong cup of coffee usually in the morning before I start work. Every time your computer starts to get into sleep mode this software initiates a key press event leading to the inactivation of the sleep mode event and keeping the system awake.