Timer

FlipClock.js - jQuery clock, timer and counter plugin

FlipClock.js was created because the other solutions weren’t abstract enough to provide a deep level of customization without rewriting the code.   FlipClock.js - Features: Use as a clock Use as a timer Use as a countdown Themeable using pure CSS Clean & Dry Syntax Abstract everything into reusable objects Full-Featured Developer API to create custom “Clock Faces”  

TimeTo - a jQuery timer countdown digital clock plugin

TimeTo is a jQuery timer countdown digital clock plugin.   

Timeago - automatically updating fuzzy timestamps

Timeago is a jQuery plugin that makes it easy to support automatically updating fuzzy timestamps (e.g. "4 minutes ago" or "about 1 day ago") from ISO 8601 formatted dates and times embedded in your HTML.   Timeago - Features: Avoid timestamps dated "1 minute ago" even though the page was opened 10 minutes ago; timeago refreshes automatically. You can take full advantage of page caching in your web applications, because the timestamps aren't calculated on the server. You get to use microform

TimeCircles - jQuery plugin to show time since or time until a specific time

TimeCircles is a jQuery plugin that provides a nice looking way to either count down towards a certain time, or to count up from a certain time. The goal for TimeCircles is to provide a simple yet dynamic tool that makes it very easy to provide visitors an attractive countdown or timer.  

jQuery Idle Timer Plugin - provides you a way to monitor user activity with a page

jQuery Idle Timer Plugin is built on jQuery and fires a custom event when the user is "idle". Idle is defined by NOT: moving the mouse scrolling the mouse wheel using the keyboard  

flipCountDown - jQuery flip count down, clock and counter plugin

flipCountDown is a jQuery plugin, that you can use this plugin for flip count down, timer, clock, or just use it as a counter.