Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
FluffyChat - Open. Nonprofit. Cute ?
WireMin - WireMin is a private messaging tool for your most personal communications.
Tor Messenger - The easiest app yet for anonymous, encrypted IM
Molly (Signal fork) - Molly is an independent Signal fork for Android
BNBSMS - Send anonymous SMS messages with blockchain & BNB token