Telegram messenger for Android
Open-source and local-first Slack and Notion alternative
Server supporting the Signal Private Messenger applications on Android
Zulip Desktop client for Mac, Windows and Linux
Distributed instant messaging system for developers
Home to the Signal Protocol and other cryptographic primitives
Used to integrate Android apps with Facebook Platform
The original full-platform IM communication layer framework
A decentralized, privacy-first Android communication app built
Secure communication software
Software per Call Center
Smoke: Android Crypto Chat Messenger
A beautiful SMS messenger for Android
A glossy Matrix collaboration client for Android
IXSF Messenger is a java-based messenger
GTK+ port of EZ Intranet Messenger