http://www.cbfsms.com/ and as far as I know and have experienced you don't get nuisance texts from using it. It does occasionally say you have to wait 5 minutes until you can send it, but well who cares when you're getting them free, eh?!
dear friends i have found a new web site by useing this web site we can send free sms greetings to our friends any where in india free of cost all we need to do is to register thats also freeso whats late start sending free sms to ur frinds and family members and have fun