What it is:

RoxIRC is a graphical IRC client written in TCL/Tk. It provides a pleasant, easy to use, and powerful interface.

What you need:

• A computer running either a Linux/Unix, Microsoft Windows, or a Mac
• In non-Linux Unix you will need Tcl 8.4 or later and Tk 8.4 or later
• A Pentium 2 or newer

What it does:

• Single tabbed window or multiple window configuration
• Switch from multiple to single window mode on the fly
• Loadable and unloadable scripts
• Fully scriptable with the power of Tcl
• ircII style /commands, with history
• Configurable colors for information types
• Dedicated query windows
• Dynamic configuration, no need to restart it
• Internal address list for quicker bans, etc
• Easily script simple events with /on
• Nicklist, see who is in the channel without /names
• Detachable or hidable nicklist
• Dialogs for banlist, modes, kick/ban, etc
• Faster than any other tcl/tk client
• Popup menus when you right click on nicks, channels, querys...
• Easy popup menu setup
• Auto reconnect to server/rejoin channels when disconnected
• Windows are hidable, not even your window manager knows about them
• URL catcher
• Supports bold and underlined text
• Netsplit detection
• DCC chat and file transfers with resume

Why it's better:

• Unlike some other tcl/tk clients, it is pure tcl, not a frontend
• Fast
• Powerful, anything can be scripted, anything can be done by command line
• Scripts can change or extend any part of the client
• Totally configurable
• Open source