Windows only: Simple count-down timer application Cook Timer alerts you after a user-specified length of time, perfect for preventing burnt food while you're busy on the computer. The tiny open-source application requires no installation and is only resident in memory while the timer is active. You can choose from one of the presets or set a custom time, and then minimise the application to the system tray until you hear the alarm, at which point the window should pop back up. The only drawback is that you can only set a single timer, so readers looking for multiple timers should check out previously mentioned Multi-Timer. Cook Timer is a free download for Windows only. (Linux source code is available but it didn't work for me).