Jasmin SMS Gateway - Jasmin is a very complete open source SMS Gateway with many enterprise-class features such as:

Digimiles - Digimiles is A2P messaging platform that enables startups, SMEs, businesses and corporate's to market their products and interact with their customers 24/7 effectively.

Ozeki NG SMS Gateway - Ozeki NG SMS Gateway is a powerful, reliable and flexible SMS Gateway application.

MyTask - MyTask is a centralized platform designed for office management, invoice management, and work management that allows a business to have the required service agility.

Bulk SMS Services - Sending Bulk SMS to the customers will engage the customers with your business and new offers.

D7SMS - Direct7 Networks provide highly reliable and cost effective Communication sms solutions to businesses across all industries.