A simple zazen / meditation timer. Create URLs for different timing settings, and bookmark them for later use.
A 'b' or 'g' plays a bell or gong sound, respectively. A number represents a number of minutes to wait.
Adjust the URL in your browser's address bar until you arrive at your desired setting, hit enter to start it, then bookmark it for use later.
Make sure your speakers are on and are loud enough to hear :)
This uses HTML5 <audio>. Both OGG and MP3 are specified so any modern browser should be happy. If you find this isn't working for you, please upgrade to the latest version of Chrome, Firefox, Safari, or Internet Explorer. If you are still having troubles, email firstname.lastname@example.org and I'd be glad to help.