aTalk - An encrypted instant messaging with video call and GPS features for android.
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
TeleGuard - TeleGuard is a secure messenger that makes it store that your data or chats are not stored while collaborating or communicating with partners and friends.
Mi Airit - Mi Airit a chat app that helps you communicate messages to the right people without receiving unwanted responses or reactions.