These maps are used in DM780's World Map display. To save a map:
In the World Map display select this map from the Map Image dropdown button in the toolbar.
Political World Map
From Fabio Visentin, this is free for private use.
Earth Lights
From NASA, this is in the public domain.
Blue Marble
From NASA this is in the public domain.
Blue Marble with Topography and Bathymetry
From NASA this is in the public domain.
Elevation
Global land and undersea elevation from NOAA's National Geophysical Data Center (NGDC), this is in the public domain.