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.
Developerhub.io - All-in-One Platform for Online Documentation
Tauria - True end-2-end encrypted group calls for up to 50 people
PortaCrypt - Create portable encrypted documents on your Mac
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
ReadMe - A collaborative developer hub for your API or code.