wftk is a Graphical User Interface library for C++ that uses SDL
as its output layer.  It allows application and game programmers to
put together portable graphical applications easily.  wftk has a
range  of already implemented widgets and uses libsigc++ as a signal
dispatching system.  It also performs resource management and has a
sound system.

WWW: http://www.worldforge.org/dev/eng/libraries/wftk