I just wanted to know is there any free sms gateway for sending SMS. If there is one, how to go on to developing my free sms service/software?
Any guidelines please.
Yes - Kannel is a free open source SMS/WAP gateway. But you still need to connect to the service providers. Its prably a lot simpler to go via an aggregator - they'll supply APIs.
Alternatively just plug a GSM modem into your server (most modern phones will provide this service)
my free sms service
Most service providers charge you for sending texts
C.
I don't know if there is a good free SMS provider but i can certainly set you on your way on developing SMS applications.
First of all check out this very good tutorial: http://www.developershome.com/sms/smsIntro.asp.
I think all you need for a starters is your own SMS modem and a prepaid card to start testing out the SMS protocol.
As for the SMS gateway i would suggest trying out Clickatell. We were very pleased with it when we first used it, back in early 2009.
Good luck!
I don't think you'll find a free webbased sms gateway. I would use a downloadable software and connect an ordinary cell phone. That way you can achieve similar results without the expensive per sms costs.
Also, if you are able to use a text messaging software that can connect to an Android based phone you can achieve some amazing speeds, and offer your sms services very longcode. (Which is a regular phone number).
Good luck, the reason I know this is because we have achieved this in our text messaging software http://www.firetext.com
来源：https://stackoverflow.com/questions/2115990/sms-application