1. Countdown / construction page (link broken)
Easy adaptable countdown, under construction – page. Including manual for easy set-up.
2. jQuery Countdown
3. CountDown jQuery plugin
4. jQuery Countdown plugin that doesn’t sucks!
6. jQuery Countdown Plugin
You’ve probably been to sites like RapidShare and MegaUpload that allow you to download files but make you wait a specified number of seconds before giving you the download link. I’ve created a similar script but my script allows you to animate the CSS font-size of each second and present a reward at the end.
7. KK Countdown
8. Cool jQuery Countdown Joomla
9. The Final Countdown plugin for jQuery
10. jQuery T-minus Countdown 2.0 (link broken)
11. Fancy Countdown
12. flipCounter (link broken)
13. jQuery Flipclock
spriteTimer is a jQuery countdown/countup timer plugin that uses a CSS sprite for the numeric digits and punctuation. The examples below are done using Rosewood font at 72pt so you’ll most likely want to change this to the font, color, and size of your choice. Please refer to the demo pack for more examples including the sample numbers.png so that you know how to slice your own image sprite.
14. Simple countdown
15. Flexible and easy to setup jQuery “countdown” clock
16. php ajax/jquery countdown (link broken)
I recently came across the need to have a countdown displayed in one of our applications. I was going to be releasing a new version of our app and wanted the users to have an idea of how long it was going to take until the application was up and running. After a few searches I found a plugin that does just what I needed, it is a jquery plugin, very simple to use and to add to any php application in just a matter of minutes.
17. Add a Countdown Timer on Your Website (link broken)
Many times as an online marketer or a product promoter you want to draw a hype to a specific campaign be it a 24 hour sale or days left until free giveaways are over. What better way than to use a nice looking countdown timer to do the job. Let’s bring our friend jQuery into this…
18. jQuery Count Down
There are numerous times when you need a count down timer. This can be done without jQuery but with many websites using jQuery, why not write this tutorial for it
19. Live Brodcast Countdown Module
Nice jQuery based countdown timer. Header text depending on countdown stateus (counting down or finished). A lot of options available. Upon time expiration the module will display the expiration message for the amount of time set in back-end. When this time reaches its limit the module will restart the countdown until next event.
20. Easy Countdown
21. jsCountdown
Included are 14 different skins to choose from and a template file (png format) to make your own.
22. JavaScript Animated Counter
Simple, animated JavaScript counter, which will allow You to present rapidly increased or decreased values, such as number of registered users, total income etc. But that’s not all… this counter can be also used as a text or date & time displayer or as a clock. It can be also used as a countdown, to show time left for the beginning of a product release campaign or a sale start. 
23. Countdown / construction page
Easy adaptable countdown, under construction – page. Including manual for easy set-up. 
24. Fancy Countdown – jQuery plugin
Fancy Countdown is a highly customizable jQuery plugin that lets you create an outstanding countdown. It´s very easy to use. You can set an own target date with a timezone. The plugin comes with an extensive API.
25. FlipTimer
FlipTimer 1.2 with 8 color themes ready made and a beautiful template with working contact form included
26. fresh Parallax Under Construction Countdown
fresh Parallax Under Construction upgrades your “Coming Soon” page with a dynamic 3D cloudy sky with your logo or item of choice in focus.
27. Coming soon landing page
Javascript Under Construction Website Counter!
28. Premium Coming Soon – WordPress plugin
29. jQuery Countdown
This is a jQuery plugin that sets a div or span to show a countdown to a given time. There are tons of options available and everything is supported by good examples and code snippets.
30. jQuery Countdown with Background and Overlay (link broken)
Really cool countdown script. There is a full package for download with script, images, css etc.
31. littlewebthings CountDown
This is an Easy to use animated countdown JavaScript. It is jQuery compatible and easily. 