SMS Local Agency - SMS Local Agency is a Complete White Label Bulk Texting Marketing System.
Twinme - Twinme – Private Messenger is a free, secure, instant, and high-definition messaging app that protects your privacy along with giving you full control over each of your relationships and contents.
chompSMS - chompSMS is a communication app developed and published by Delicious for Android and iOS devices.
Textra - Textra is a seriously beautiful, feature rich SMS and MMS app.
iRealSMS - Do you love your iPhone but hate the limited Messages app?
Material Messaging - Material Messaging is a beautiful communication app that lets you send and receive SMS and MMS messages using the intuitive interface while giving you complete control over every aspect of your messaging experience.