Hi, you can try out my service, http://www.messagingreminder.com/, a try for
a month free.  My service, and please remember that I'm a one-person shop,
automatically sends a reminder to your mobile phone even if your computer is
turned off.  And you don't have to buy any extra third-party software to use
it!

If you have any questions or comments, please contact me.  Thanks, Matt.

Also, have a look here: http://www.slipstick.com/addins/pager.htm