Ozeki NG SMS Gateway - Ozeki NG SMS Gateway is a powerful, reliable and flexible SMS Gateway application.
Heymarket - The professional way to text message. Your customers are mobile. Heymarket helps you manage those relationships from your smartphone.
Kannel - Open Source WAP and SMS Gateway
SimplyCast - All-in-one platform that allows you to discover, organize, and communicate with your leads over all the channels of communication
Bulk SMS Services - Sending Bulk SMS to the customers will engage the customers with your business and new offers.
Avochato - Text messaging for your business.