Connect to a Service Bus namespace and administer messaging entities
Mumble is an open-source, low-latency, high quality voice chat
An alternative Discord client with voice support made with C++ and GTK
Instant messaging platform
API Support for your favorite torrent trackers
Microsoft project for cloud-based client-server communication
Feature rich WhatsApp Client for Desktop Linux
Take control over your live stream video by running it yourself
A dynamic library tweak for WeChat macOS
The very last word in instant messaging
High Performance TCP/UDP/HTTP communication component
High performance .NET library for MQTT based communication
(Golang) Go bindings for Discord
Miranda NG: Next Generation of Miranda IM
Chat client for Twitch
The extensible chat client
Async PHP client/server API for the telegram MTProto protocol
PC WeChat chat robot with secondary development interface
A private, p2p alternative to Slack and Discord built on Tor & IPFS
A Discord Bot to protect your server from spam, invitations
Matrix reference homeserver
WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.
A universal instant messaging (IM) program
You can message and share files inside your intranet without a server.
A Windows client for the Direct Connect networks