New port: Xfce Foundation Classes.
The Xfce Foundation Classes (XFC) is a set of well integrated C++ classes
for developing Xfce applications on UNIX-like operating systems.
XFC combines the power of GTK+ and the power of C++ into a state-of-the-art
application development framework for the Xfce Desktop Environment. XFC
judiciously uses C++ language features to avoid layering on too much extra
C++ complexity. Its API is easy to understand and use, and should feel
immediately familiar to most GTK+ programmers.