ClicksAndWhistles is a free IRC client for Windows. The latest version has the following features:

• Support for multiple ‘identities’
• Support for multiple server connections
• Channel favourite list
• Floating (desktop), MDI and tabbed windows
• Connection Tree and Connection Monitor
• Themes, PNG image backgrounds and outline fonts
• Pop-up and sound event notifications
• Unicode (UTF-8) support
• Text formatting (coloured and bold/italic/underline fonts) with format bar
• Keyword highlighting and sound notification
• Channel and user logging, log archiving and log reloading
• File transfers (DCC SEND) and direct chat (DCC CHAT)
• ‘Connection scripts’ (a simple list of commands to run once connected)
• Macros (use one command to automatically run a series of other commands)
• Customizable message text Free for Windows Vista and XP.