libircclient is a small but powerful library, which implements client-server
IRC protocol. It is designed to be small, fast, portable and compatible to RFC
standards, and most IRC clients.
libircclient features include:

	* Full multi-threading support.
	* Single threads handles all the IRC processing.
	* Support for single-threaded applications, and socket-based applications,
		which use select()
	* Synchronous and asynchronous interfaces.
	* CTCP support with optional build-in reply code.
	* Flexible DCC support, including both DCC chat, and DCC file transfer.
	* Can both initiate and react to initiated DCC.
	* Can accept or decline DCC sessions asynchronously.
	* Plain C interface and implementation
		(possible to use from C++ code, obviously)
	* Compatible with RFC 1459 and most IRC clients.
	* Free, licensed under LGPL license.
	* Good documentation and examples available.

WWW: http://www.ulduzsoft.com/libircclient/