Get Voice and Text Reminders on Your Phone
From: PC World - Steve Bass's Tips and Tweaks - 03/05/2008

You get old. You forget things, like anniversaries and birthdays. 

I've set up eight reminders on Rminder (the limit on a free account). On the
specified date and time, a disembodied, robotic voice will call my wife's
cell phone and tell her I absolutely haven't forgotten our anniversary. I'm
able to send reminders to any US-based phone.  

If you don't like Rminder, or its silly spelling, I have more ways for you to
jog your memory while mobile.  

Try bitBomb. Like Rminder, it's free, and you can set up recurring and group
reminders. Use it worldwide, though it's limited to sending reminders to
SMS-capable cell phones.  

TextMemos.com lets you set up text messages to be sent to your cell phone on
specific days and time. It's a quick way to send yourself a reminder without
having to sign up or register. 

From:
http://blogs.pcworld.com/tipsandtweaks/archives/006587.html?tk=nl_bexblg

Links:
Rminder
http://www.rminder.com/

bitBomb
http://bitbomb.com/

TextMemos
http://www.textmemos.com/