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
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.
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.
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.
Retro Flipping Countdown Timer In JavaScript – flipdown.js
A retro-style flipping countdown clock that shows how many days/hours/minutes/seconds until an event you provide.
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.