You can send free sms from mobile to mobile.Yes it is true.You have many choices to choose , but different websites give you different features , and you have to choose between them.Here is the list of free sms services :
These were a few and well known , most of the people use these services in order to send sms , i myself use way2sms , you can choose any of the above or many of the provided.The another advantage of these services is that you can also send group sms and can also save contacts in the site itself.Everything that these sites provide is free of cost and you no need to hesitate.