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.
Scroll-triggered Counter Plugin – purecounterjs
A pure JavaScript counter plugin which counts down or counts up towards to a specific point when the counter is scrolled into view.
Basic Countdown Timer In Plain JavaScript – Countdown.js
A simple, lightweight JavaScript library for displaying countdown timers on the web page.
Easy Customizable Counter In Vanilla JavaScript
An easy and tiny counter JavaScript library that can be used to count up or count down to a given number.
Count Down To A Date With Custom Until/End Messages – sv-countdown
A Vanilla JavaScript countdown clock that counts down to a specific date with custom styles and until/end messages.
Animated Number Counter In Vanilla JS – number-rollup
An ES6 library to create an attractive number counter with animated counting on the webpage.
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.
Classic Flip Clock Style Countdown & Counter Library – flip.js
flip.js is an open-source, fully customizable, pretty nice, classic flip clock style countdown & counter component in vanilla JavaScript and CSS.
Feature-rich Countdown/Clock/Timer In Vanilla JavaScript – W3FClockTimer
W3FClockTimer is a feature-rich JavaScript to create countdown, clock, timer components on the app.