Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
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.
Standuply - Run daily standup meetings and track your metrics in Slack
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
MeetNotes - Increase Productivity with Meeting Notes Tool. More effective minutes, Prepare Agenda, Collaborative Notes & Action Items.