Google has all kinds of clever search commands that save you time. Reddit user Blemish points out that you can use a command to keep track of time as well.
You can set a quick timer by typing, "set timer X minutes" into Google. Once you hit enter, the timer will count down and sound off when the time expires with an obnoxious, possibly never-ending tone. If a countdown doesn't do it for you, then you can also use the command, "set timer for X time". It's a simple but effective way to create an alarm without installing any special software.