A free Windows software to prevent your computer from going into idle or sleep mode. Awake comes in handy when you have a a task which requires long time to execute.
Day Night is a desktop app that shows you how much time left in percentage.You can keep track of today, month and year time in percentage. In addition to that, Day Night have awake mode, sleep mode and etc.
Insomniate is a very lightweight app that prevents your computer from going into Sleep / Standby mode
Wake on LAN tool for GNOME users
Nappy – Allows members of your family and friends to see at a glance whether your baby is sleeping or not