Telegram Desktop messaging app
Server for NATS.io, the cloud and edge native messaging system
A Decentralized, Onion Routed, Private Messenger
ArmCord is a custom client designed to enhance your Discord experience
A glossy Matrix collaboration client for the web
Home to the Signal Protocol and other cryptographic primitives
An open-source cross-platform alternative to AirDrop
ownCloud web server core (Files, DAV, etc.)
A free (libre) open source, mobile OS for Ethereum
Yet another matrix client
A New Kind of Instant Messaging
The immutable, decentralized, statically built p2p VPN
Mixin Messenger desktop app for macOS, iPadOS, Linux, and Windows
Open source email service with a strong focus on security and privacy
LXMF client for Android, Linux and macOS to communicate with people
Send files and folders anywhere in the world without storing in cloud
Mumble is an open-source, low-latency, high quality voice chat
PHP secure communications library
Open-source community forum software
XMPP for JavaScript
Yet another matrix client for desktop
Private messenger for Windows, Mac, and Linux
Hyperledger FireFly is the first open source Supernode
Matrix reference homeserver
Fast, secure email client with chat and kanban views