Smuxi IRC Client Gets Major Update with Twitter OAuth Support

Smuxi is an irssi-inspired, flexible, user-friendly and cross-platform IRC client for sophisticated users, targeting the GNOME desktop.

From the Developer's website:
  

Development of Smuxi started in 2004 making an IRC client that fits the needs I could not satisfy with irssi. I was using irssi over 4 years and it's the best the IRC client I have used so far. Most annoying was that it didn't integrate at all into my desktop experience (such as mouse / clipboard / theming / highlight handling). Thus irssi inspired lots of features and commands seen in Smuxi. Smuxi pioneered the separated engine / frontend concept inside a single graphical client application and has been the focus of development since ever then.

Features:

• All the basic IRC client features like support for multiple networks, filters, nicknames, keyboard shortcuts, auto-connect, clickable urls, theming, channel list, search etc.
• Support for Twitter
• Multiple Language Support
• For a detailed list of features, go here

New features and improvements this release (version 0.8) codename 'Godsend':

• Support for OAuth twitter authentication
• Multiple Twitter Account Support
• Desktop Notifications
• Messaging menu integration 
• More distinct nick colours by using a combination of colours 
• Use of Nick colours for user lists 
• Emphasis of own nick in bold, making it easier to distinguish sent messages 
• Toggle-able menubar 
• Full screen mode support for enhanced netbook experience 
• Browse mode support 
• Remembering of tab order when reconnecting to a smuxi-server
• Sound support by notification daemons which support this extension 
• Display of IRC network name instead of hostname in the tab 
• Addition of 'Open Log' button for easy viewing of logs.

To install run following commands in terminal (for Lucid Only):

sudo add-apt-repository ppa:meebey/ppa
sudo aptitude update
sudo aptitude install smuxi 

Maverick users can download it from software centre.

Source