I have been using Safeswiss for a while now and found it exceptionally good. The new Droid update looks very modern, some really need features that you don't find on other messengers, push to delete anytime works very well, I also like signup requires no phone number or email, Unlike Telegram, all messages & voice calls are fully encrypted by default - Very good worth a try
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
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.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Textnow.com - It lets you text your friends, aka my only source of happiness
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
FluffyChat - Open. Nonprofit. Cute ?