Chax

Chax adds a bunch of improvements to iChat that make it easier to use and include new features for managing the application, including:

- A comprehensive list of contacts that brings all your contacts from different accounts together in one place

- Notifications via Growl for new messages and other users' status changes

- Automatic resizing of the contact list to fit the number of visible users

- Automatic acceptance of file transfers

From its logs, you can also use Chax to check the status changes for any contact as well as keep your contact list, video conference call, or shared screen on top at all times.

From the Chax tab in the iChat preferences panel, you can adjust the settings of this application to suit your needs.