Javascript Timer
This module provides a timer API that can attach countdown timers, count-up timers, or clocks to HTML elements. It uses JavaScript and an event loop to efficiently manage multiple timers on a single page without requiring external libraries.
Module details
The oldest of all of the 'jquery countdown timer' modules! The Javascript Timer module provides a timer API that can hook HTML elements to javascript widget objects. This is useful if you want a moving timer/clock or a widget that updates every second. It comes with widgets for a count-down timer, a count-up timer, and a clock. It uses jQuery and a single event loop to handle as many timers as you need on a single page.
This module replaces the Javascript countdown timer project with a small api change (class name).
This module has no dependencies and requires no libraries outside of Drupal.