Add contacts to your address book and send them texts for free.
Give the app a try here (it's mobile friendly). It's built using the Meteor framework.
Sometimes during peak usage times, Meteor's hosting can be a little unresponive. If Meteor reports that the site is unavailable, try refreshing the page.
Please see the issue tracker for planned features/known issues.
NOTE: The demo linked to here is a pre-Meteor 1.0 version since some functionality was broken during the transition to Meteor 1.0.