Bluetooth mesh chat, IRC vibes
Berty is a secure peer-to-peer messaging app
LXMF client for Android, Linux and macOS to communicate with people
A New Kind of Instant Messaging
A free (libre) open source, mobile OS for Ethereum
Home to the Signal Protocol and other cryptographic primitives
Development toolkit for Web Services and XML data bindings for C & C++
Smoke: Android Crypto Chat Messenger
Secured blockchain group messaging
Experimental implementation of high performance interactable views
Simple and lightweight IM client
Cross-Platform Mobile Messaging Application