Last Modified is multi-platform compatible. This is a handy usefull script which show the date and/or time when the HTML document was last modified. Just one script, without any additional file can be applied to any number pages of your website.
Nytedate is Unix compatible. This script is very easy to setup and is used to put the date on your site. It gives the current day, month, year, and month day. There are 3 choices of styles to chose from, and you can add more choices if you choose to.
Realtime Cgi Clock is a multi-platform compatible code that will automatically display a clock on the corner of your visitor's browser. You can set it to display your server's time or the visitor's local time.