SendSMSnow - SendSMSnow is one of the best services over the internet that lets the users to send free SMS in any part of the world in addition to India.
Twilio - Brings voice and messaging to your web and mobile applications.
AFreeSMS - AFreeSMS is a free web-based service that allows you to send unlimited free SMS messages online, no need to register, just type your message and send unlimited SMS to anywhere around the world for free.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
FreeSMS8 - FreeSMS8 is one of the best SMS sending websites that allow the Indian phone users to send free SMS to any mobile network operating in India.
BulkSMS - SMS messaging service provider offering two-way SMS communication services.