QPlot3D
QPlot3D is intended to be a lightweight 3D plot library for QT based on OpenGL.
Example
QCurve3D curve();
curve.addData(0,0,0);
curve.addData(QVector3D(1,1,1);
curve.setColor(Qt::green);
QPlot3D plot;
plot.addCurve(&curve);
plot.show();