Quarter is a light-weight glue library that provides seamless
integration between Systems in Motions's Coin high-level 3D
visualization library and Trolltech's Qt 2D user interface library.
The functionality in Quarter revolves around QuarterWidget, a subclass
of QGLWidget. This widget provides functionality for rendering of Coin
scenegraphs and translation of QEvents into SoEvents. Using this
widget is as easy as using any other QWidget.

Quarter package requires Qt 4 and Coin libraries, both available at
SlackBuilds.org.