Review of Google Voice free SMS site:
SMS site description:
Currently only available in the US, Google Voice lets you send free sms. Text messages sent and received through your Google Voice number are completely free. ...
Registration required, etc:
|Confirmed delivery of messages?||Don't Know|
There is a mobile application for Android and Blackberry devices which lets you send sms directly from your cell phone for free. The Google Voice application is currently under development for the iPhone.