wxWidgets is a library for creating graphical interfaces.  The specific implementation installed is wxGTK.

Website: http://wxwidgets.org/

Installed versions:  2.8.10, 2.8.12, 2.9.4

Acknowledgement: 

Licensing:  GNU Library GPL

config line:

./configure –prefix=/software/wxGTK/2.8.12 –enable-unicode

(unicode flag is for use with audacity)