in-the-sky.org
This is only a web app, but it provides a way to display the positions of satellites in real time, including those used for navigation, as well as other sky/space objects and spacecraft.
Select objects to display, with or without labels:
Options:
- World map
- Satellites above your horizon
- 3D globe
- Planetarium view
- Search overhead passes
3D Globe view:
World Map view:
For all views, you can zoom in or out, pan in all directions, check objects at any location in the world at any given moment, and by specific date and time.
(Lots of other interesting sky-maps there, too.)