Easy Timer/Countdown/Chronometer Library – easytimer.js
easytimer.js is an easy-to-use JavaScript library that allows to count up to or countdown from a given value with callback support.
JavaScript & CSS countdown
Countdown Timer Plugin With Pure JavaScript – TimezZ
This is the standalone version of the jQuery TimezZ plugin that lets you create a customizable countdown timer in days:hours:minutes:seconds format.
Circular Countdown Timer In JavaScript And CSS3
A minimal countdown timer with a SVG based circular countdown indicator, implemented in pure JavaScript and CSS/CSS3.
Flipping Countdown Clock With JavaScript And CSS – countDown.js
countDown.js is a dependency-free JavaScript library for creating a countdown timer just like the retro looking flip clock.
Easy Datetime Countdown Timer – Countdown.js
An easy-to-style countdown timer implementation in pure JavaScript. It will display EXPIRED when the count down is over.
Stylish Customizable Countdown Timer Library
This simple library helps you create timers with countdown progress bars, variable background colors and custom alarm audios in the webpage.
Pure JavaScript Digital Countdown Timer – Countdown Module
Countdown Module is a pure JavaScript library that uses CSS animations to create a beautiful, 7-segment digital countdown timer for your web app.
Minimalist Countdown JavaScript Library – timeCounter.js
timeCounter.js is an extremely lightweight JavaScript library used for creating a countdown timer in years, months, days, hours and seconds.
Simplest JavaScript Countdown Timer – pureJSTimer
A simple, unobtrusive JavaScript library for create a countdown timer which allows you to count down (up) from (to) a specific time.
Minimalist Countdown Timer with timerJS.js
timerJS.js is a super tiny javascript counter library that counts down in in seconds, minutes, hours and days to any date/time.