star chat

Search your Messages chat history with ease.

Encrypted BBS style client for chat, messaging, and transfers.

Lightweight IRC chat client.

Jabber chat client.

Push to talk voice chat.

Highly Secure Email, Chat, Instant Messaging, and Collaboration.

Visual chat client for The Palace.

Nimbuzz for Mac lets you call, chat and interact with your friends.

MSN chat client.

Jabber/XMPP chat client.