This Script will set a time limit to the time someone can see a speccific page of yours. Remaining time is constantly displayed in the status bar. After time expires user is forced to change page.
Developer: geocities.com Platform: Independent Date upd:1999-08-22 Hits9509 [Visit]

Create a dynamic Countdown Player fitting anywhere into your webpage. Simple configuration of fonts, colors, size etc. Insert as many counters per webpage as you like. Simply use the green or blue generator to create the code. The green generator creates a date-countdown counting
Developer: 24fun.com Platform: Win 98, ME, 2000, XP: IE5x/6x, NS6x/7x, Opera 6x/7 Date upd:2004-03-02 Hits8880 [Download] [Visit]

This JavaScript allows you to see how much time has passed since you were born, or see how long there will be between 2 different dates.
Developer: lawrencegoetz.com Platform: Date upd:2000-01-10 Hits3907 [Visit]

Certain situations call for the refreshing of the webpage every few seconds/ minutes (such as a webcam page). Use this script to carry out the task in a graceful, "visual" manner.
Developer: dynamicdrive.com Platform: Date upd:2001-08-22 Hits18988 [Visit]

This is a "universal" count down script that lets you count down to absolute events whereby the target date/time needs to be specific to a certain time zone, such as the date/time of the next Solar Eclipse.
Developer: Dynamic Drive Platform: linux, windows Date upd:2006-06-13 Hits3011 [Visit]