Chalk - Chalk is a calculator that tries to do right what others do wrong.
Manyverse - A social network off the grid
chitchat - Chat Room with Selfies and Pagers (yes, pagers!)
Wire - Private & Secure Messenger
Twist - Check fewer notifications, do more meaningful work. Twist is the team communication app for calmer, more organized, and more productive teamwork.
nocnoc - Instant group chat invite via link