Swift SMS Gateway - SMS Gateway is your bridge between the Internet and the world of cell phone SMS text messaging.
Jasmin SMS Gateway - Jasmin is a very complete open source SMS Gateway with many enterprise-class features such as:
Ozeki NG SMS Gateway - Ozeki NG SMS Gateway is a powerful, reliable and flexible SMS Gateway application.
Plivo - Plivo simplifies your customer engagement.
KAPSYSTEM - KAP Computer Solutions Pvt. Ltd.,
Flashy - Email & SMS marketing automation platform