Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
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.
NotifyXF - Send notification to yourself in Telegram
Tauria - True end-2-end encrypted group calls for up to 50 people
Talla the Task Assistant - A.I. task-list manager built for Slack
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.