Kashyyyk
A Work-In-Progress, Full-Featured, Open Source IRC Client
..., and FreeBSD. Additionally, it can be compiled for Cygwin/X.
When possible, Kashyyyk takes advantage of native OS capabilites, such as the OS X notification center.
Kashyyyk uses the libfjirc library originally written for the Whittler IRC bot and the libfjnet wrapper written for TurboSphere. It has an FLTK-based GUI. Kashyyyk is intended to be cross platform and easily compiled. It is known to compile using Clang, GCC, Cygwin, Sun Studio, and MSVC 2013.