InspIRCd - InspIRCd Internet Relay Chat Daemon is a modular, high performance IRC daemon combining stability and a rich and extensive C++ API with optional features such as SSL and permanent channels.

SendBird - SendBird is messaging-as-a-service.

ngIRCd - ngIRCd is a free, portable and lightweight Internet Relay Chat server for small or private...

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

ZNC - znc is an IRC proxy. It runs as a daemon and connects to IRC server, then allows you to connect...

uhChat - uhChat is a chat window software that can be integrated into any website.