Bulk Sms Solutions

we need a bulk sms s/w with entire code and no copyright issue with below feature. Specification 1-As i have to give this s/w to my various distributors, i only need to give them exe file with individual key. 2-For every distributors sms limit need to set for each day like 4000 sms per day only, which will be increase / decreased by me. 3-All the mobile number should be enter in exl sheet with differnt template(like region 1 customer,region 2 customer) and finally at the end of day just connect with internet and all sms will be send to customers. 4- Other then English, sms can also be send in other major indian language. 5-Needless to say, it should be in GUI, easy to use by distributors ,with minimal training. 6- Though we will send max 20-30 words message ,but it will be good if there is no cap on Wordlimit. may be 2 sms for one message. Other Details will be discuss later