SamePlace
SamePlace is a simple, easy to use chat client. It sits in Firefox's sidebar and can be hidden at the press of a key.
SamePlace lets you to chat with your contacts from GMail, and any service that supports the XMPP protocol, as well as contacts from legacy networks (MSN, AIM, ICQ, ...) through special gateways.
Features
Follow chats easily in the sidebar while browsing the
web. No need to go back and forth between your
navigation and a chat web site.
Chat with GMail contacts, contacts on other Jabber-based
networks, and contacs on legacy networks such as MSN or
AIM through special transports.
Drag and drop pictures from web sites right into your
chats.
Find a contact by typing just part of their name.