Libircclient is a small but powerful library that implements the 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.
* good documentation and examples available.
this package contains the development files.