From this site you can send unlimmited sms to anywhere in the world there is no credit limit or charges for sms on HAPPY TEXTING
From this site u get 10 sms credits per day and one sms charge of 3 credits so per day u can send three messages only from this site u can see delivery report as well
From this site u can send 10 messages per weak and the good thing in this sms site is that nobody can know.. that you are sending message from web