kwin-style-qtcurve 1.8.14-3 (amd64 binary) in ubuntu trusty

 This package contains the QtCurve window decoration for KWin.
 .
 QtCurve is a set of widget styles for KDE and GTK+. It provides a consistent
 look between KDE and GTK+ applications, which is easy on the eyes and visually
 pleasing.
 .
 The corresponding GTK+ theme engine can be found in gtk2-engines-qtcurve
 package.