TextNow - TextNow is a mobile virtual network operator (MVNO) that provides a free phone service to users by using other cellular networks coverage.
FluffyChat - Open. Nonprofit. Cute ?
Talk360 - Talk360 is a best-in-class communication utility that offers a convenient way to connect with loved ones globally.
Molly (Signal fork) - Molly is an independent Signal fork for Android
TextMe - TextMe is a free calls and messaging application at both local and international levels.
Olvid - The most secure messaging app in the world.