ShoutOUT - All in one business texting tool to send personalized alerts, promotions, reminders, short links and marketing campaigns, for any SMEs (hotels, restaurants, education, non profits, Woocommerce, banks, healthcare, agencies, supermarkets, weddings)
Jasmin SMS Gateway - Jasmin is a very complete open source SMS Gateway with many enterprise-class features such as:
Clickatell - Simple, reliable mobile messaging cloud.
Kannel - Open Source WAP and SMS Gateway
LinkTexting.com - LinkTexting.com offers SMS marketing solutions to convert desktop traffic to app downloads.
Bulk SMS Services - Sending Bulk SMS to the customers will engage the customers with your business and new offers.