I have explained about websites that are giving service of free sms. I have tested them on 31st Dec. I got there performance, efficiency & delay time for receiving sms.
First I had send sms from atrochatro.com. Which gives service to send sms of 160 character & only 2 daily. My sent sms is not received yet!!!!
Second it was 160by2.com. I had sent sms at 8p.m on 31st. It was received @ 5 a.m. on 1st of Jan. So this site gives sms delivery for sure but requires time.