TextArabia is a free worldwide sms text messaging service. You can send sms from your computer to any mobile phone in the world.
If you register you can send 2 free text messages daily. Comes with an online address book so that you can send text messages using your nickname rather than your mobile phone number.
Registration required, etc:
Registration required? Yes
Receive messages? No
Confirmed delivery of messages? No
Message length? 160
Message Quota? 2 sms messages per day