Looking for Snow Leopard support? Alpha Versions of Chax are now available for Snow Leopard. See the blog for the latest information.
Chax is a collection of small modifications and additions that make using Apple's iChat more enjoyable.
Features
Unified contact list shows all contacts from all accounts in one window
Growl notifications for new messages and users changing status
Automatically resize the contact list to fit the number of visible users
Built-in log viewer
Activity log that displays your contacts' status changes
Auto-accept file transfers, AV chats, and screen sharing requests
Toggle text status visibility of users
Always on top option for contact list, message windows and AV chats
Set font of names, status messages, and group separators
Option to auto-accept text chats, skipping new message notification window
Show status changes directly in the message window
Additional unread message notifications in the Dock
Automatically go away when the screensaver activates
Properly use ICQ accounts without sending text formatting in messages