X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
Briar - Secure messaging, anywhere
Padlet - Visual boards for organizing anything.
Chat Offline - Last week, and after logging about 100 hours on Apex Legends, Origin started to do me dirty by showing "Chat offline" this results in not showing my friends list in game and me not being able to join them for a game as a result.
Simple Poll - The easiest way to create polls in Slack
The Serval Mesh - It works by using your phone's Wi-Fi to not communicate with other phones on the same network.