Elapsed time since  

Elapsed time since is a small piece of code (a PHP function) that calculates and displays the time elapsed since a given date.

Hosting Requirements: Unix, Windows
Price: Free

   Offset Calculator  

Determine the difference between your local time and the server time.

Hosting Requirements: PHP
Price: Free

   CowTime  

This is just a simple script that when called, places a clock on your page. You just call the script and depending on the parameters included when you call the image determines what the clock will look like. There are four formats that the clock can look like. 12 hour clock without seconds is the default, 12 hour with seconds, 24 hour without seconds, and finally 24 hour with seconds.

Hosting Requirements: PHP 4.3.1+; GD 2
Price: Free (GPL)

   phpDateTime  

php-Classes for easier handling (Day)Time and Date-Values like seconds, minutes, hours, days, weeks and Calendar-Dates and Timespans, espacially as interface between DB and Display, handles Unix-Timestamp, MySQL-Timestamp, ISO, DIN, AMI, UK, local-names.

Price: Free (LGPL)

   Last update  

Last update checks the last modified date for the files in a set of directories you specify in the script, and produces a Unix timestamp (that can be used with the DATE function) of the most recently modified file in those directories. This allows webmasters to display a single 'Last modified' date on their site which lists the date and time of the most recent change on the site.

Hosting Requirements: Unix, Windows
Price: Free

   DateCalculator Script  

This script allows you to calculate a date by adding or subtracting a certain number of days.

Hosting Requirements: Linux, Windows; Apache; PHP4
Price: Free

   Date in PHP  

This PHP script is a code that shows the date with the day of the week. You have to use a php include where you want it to show on your site and can be translated. Really easy to use and to change if needed.

Price: Free

   Time in PHP  

This script is a code that shows the time of the day . You have to use a php include where you want it to show on your site. Really easy to use and to change depending on your server's location if needed.

Price: Free

   RGNClock  

RGNClock is a nifty little program that displays the current time on your web server in graphical form.

Price: Free

   Binary Clock  

Script that shows the current time in binary format.

Price: Free