SoQtPlaneViewer(3) on Linux
The text 07dc39e50845, as Debian 9 (Stretch) shipped it. The page shows this text now.
The SoQtPlaneViewer class is for examining 3D models by moving the camera in orthogonal planes. The SoQtPlaneViewer is a viewer that is useful for 'CAD-style' applications, where you want the end-user to examine your model with the viewpoint set from one of the three principal axes.