statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
ProTexting - ProTexting offers mobile marketing tools for businesses to communicate with their audience via SMS & MMS campaigns.
FreshStatus - Better status pages in 1-click, FREE FOREVER
Clickatell - Simple, reliable mobile messaging cloud.
Avaya one-X Agent - Other Customer Service
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)