This module provides an on site chat, located in a block.
Chatblock focuses on simplicity. It does not require additional resources like IRC, Java or flash and although it is thoroughly built with Javascript, it even works basically in no-script environments. While other modules provide much more flexibility and manifold functions, chatblock aims to be easy to handle, compact and save as much server CPU as possible.
Features
Easy to set up, simple to use.
Ideal for any site that needs no more than *one* generic chat room.
As the chat comes as a block, it can be easily placed anywhere on your site.
Configurable chat history (which automatically cleans up on cron runs).
Optionally, some basic smiley codes transform into graphical smileys and links become clickable.
Basic fallback functionality for users with Javascript disabled.
The download_count module tracks downloads of private files attached to nodes via the core upload or contributed filefield modules for d6 and private core file fields for d7.
Allows a blacklist of sites that will have a rel="nofollow" attribute added to their link tags whenever used on your site. Originally the only page in the blacklist was Wikipedia, though it now allows an admin controlled blacklist and whitelist.
Installation note: You must configure the input formats and add this to a format for this module to work.