There are so many websites to send messages to the mobile from their website at free of cost but they are having some restrictions to offer this service.
Now you can send the messages from Gmail itself to anyone in your Gmail contact book right from.
To send the messages just follow the following steps.
Go to the Gmail Lab Settings and enable the “Text Messaging (SMS) in chat” radio button. This is the fair enough to send the messages from Gmail.
You can send and receive the messages through embedded chat in Gmail website but it is not possible to send and receive from the standalone Google Talk client. Unfortunately this facility is available for only US numbers.
[ Thank You ]