Adheeth’s Free Sms Service to India Link has been down ever since the server migration. I’ll try to restore it back as soon as possible.
Update: Ive made the free service Up.It’s not tested and no gurantees.
Free sms to India service accessible at http://sms.adheeth.com
 Free SMS services to India mostly are Email to SmS based, the delivery of which is not 100% guranteed. So the best option is as always use SMS from your mobile to sent important messages.

What Exactly is Email to sms?
 Every network/ Operator has a email message like @networkprovider.com. So you can send a message to yournumber@networkprovider.com to get that message from email into your mobile phone. Aah Some dint get what i was talking about. Letz take an Example. Assume that you are from Kerala India and you are using Airtel Kerala. The airtel kerala Domain is airtelkerala.com. and your Mobile number is 9895123456. So an Email sent to 9895123456@airtelkerala.com can get delivered to your Mobile phone as an SMS. This method of sending Email to Mobile phones using the network provider Email Address is called Email to SMS. Adheeth’s Sms service as Based on Email to Sms.
There are Many Free SMS to INDIA services offered in Internet. You can google it to find the Links