UnrealIRCd - UnrealIRCd is an Open Source IRC Server, serving thousands of networks since 1999.
Trillian - Trillian is a decentralized and federated instant messaging platform that lets your whole company send private and group messages, keep tabs on what co-workers are doing, share files, and much more.
ZNC - znc is an IRC proxy. It runs as a daemon and connects to IRC server, then allows you to connect...
LimeChat - LimeChat is an IRC client for Windows, Mac OS X and iOS. Features
ngIRCd - ngIRCd is a free, portable and lightweight Internet Relay Chat server for small or private...
Adium - Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.