Dingtone - Dingtone is a free call and texting application for making unlimited calls and text messages to any number at the moment registered in any part of the world by any cellular company.
FluffyChat - Open. Nonprofit. Cute ?
Textnow.com - It lets you text your friends, aka my only source of happiness
Olvid - The most secure messaging app in the world.
Molly (Signal fork) - Molly is an independent Signal fork for Android
Mi Airit - Mi Airit a chat app that helps you communicate messages to the right people without receiving unwanted responses or reactions.