How to create a circular countdown timer using HTML, CSS or JavaScript? - Stack Overflow
jQuery Plugin for Countdown Timer on HTML Page | SyoTimer
GitHub - krishnadevz/timer: StopWatch/Countdown timer created in javascript css and in html use of this app is for setting timer in StopWatch In the browser
jQuery Countdown / Count up Timer with Callback - flipTimer — CodeHim
Simple Countdown Timer using JavaScript - DEV Community