Marble is a virtual globe application which allows the user to choose among the Earth, the Moon, Venus, Mars and other planets to display as a 3-D model.

It is free software under the terms of the GNU LGPL, developed by KDE for use on personal computers and smart phones.

Marble is intended to be very flexible; beyond its cross-platform design, the core components can easily be integrated into other programs.

An important user-experience objective being that the application start fairly quickly, it ships with a minimal but useful off-line dataset (5–10MB[citation needed]).

[3] Contributors have added support for on-line mapping sources such as OpenStreetMap and the ability to interpret KML files.