Recently Google launched Google SMS Channels , as sms is a craze in India and Google came to know about this so they capitalized on it and launched the Group Sms channels. Through this, one can either create a Channel and invite others to join it and others can also join through Subscribing to the channel and that's it you will now receive all the messages being posted on that channel or you can simply join any Channel of your choice and you will recieve messages. Till now there are no advertisements, but don't know about the future but all in all its a very good way to send and recive messages.
Other Free Sms sites:
Sms GupShup
MyCantos
