since they always need a C compiler, even when the source code is
completely in C++.
For some other packages, stated in the comment that a C compiler is
really not needed.
Features
* Standard IRC features
* SSL server support
* Bookmarking support
* Easy to use graphical user interface
* Multiple servers and channels in one single window
* DCC file transfer
* Multiple identities for different servers
* Text decorations and colors
* OnScreen Display for notifications
* Automatic UTF-8 detection
* Per channel encoding support
* Theme support for nick icons
* Highly configurable