BuddyPress group Chatroom is a simple chat for BP Groups, it supports the sharing of text and links within a chatroom installed within the GP Group.
Wise chat is a simple chat plugin that installs a chat page on your WordPress site allowing site users both registered and non-registered to interact together via a basic chat application.
IflyChat is a chat plugin for BuddyPress social networking sites, it creates a close approximation to the chat used on the Ning Social platform which features “Chat on any page” as a feature, which allows users to browse around the site without having to leave the chat conversation.
BuddyPress Instant Chat provides a one to one chat page for members of a BuddyPress social site. You use it by visiting the chat page, searching for the member you want to chat with, and then entering your chat message.