OnlineClock.net is Very Handy

http://OnlineClock.net is a free alarm clock you use in your browser. Just visit the Online Clock website and choose your desired alarm time with a couple of clicks. Once the alarm time has been set, leave your computer running and one of your web browser's tabs open to this digital clock site. When your alarm time comes up, you'll be awakened or reminded with a fun chirping kind of sound. It's an easy and fun online alarm clock.