Tatango is a free group SMS service which makes it easier for you to send a message to a large group of friends from your computer or mobile phone. You would need to register with Tatango to do it and also it requires your friends and contacts to opt into receiving messages from you, which ensures that the system is not used by spammers. The free service is ad supported and you can send unlimited messages to your group through their site or your cell phone.
Tatango also offers a pro account with more features like scheduled messages and custom integration at a low monthly cost of $4.95. As you could see in the above screenshot, the user interface is simple and easy to use. This service has already attracted large groups like sports teams, schools, musicians and organizations to foster easy communication among themselves.
Check out Tatango @ www.tatango.com