Dialpad - Switch is a cloud-based phone system built for Google Apps users.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
GlobalMeet Collaboration - From cloud PBX to conference calls and meetings to online events, GlobalMeet is a business communications platform that helps take you where you need to go.
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.
MiCloud Connect - Secure and flexible cloud phone services and unified communications.
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.