Mozat M2U Client
Actually it's not a webpage, it's a little programm installed on your computer, from where you can send SMS to every mobile network! And yes, it really is working. All you have to do is to download it from here
and execute it. After you have opened it, click File -> Register User. Soon after that you will receive 30 free SMS credit and just like that every month! Don't believe it? Just PM me your mobile phone number and I'll send you a verification.