Stellarium 0.11.2

Shows what you're looking at when viewing the stars

Publisher: Stellarium  Rating: 7.2 out of 10 (614 votes)

NASA World Wind 1.4.0.0

Zoom in to any place on Earth via NASA's satellites

Publisher: NASA  Rating: 7.5 out of 10 (176 votes)

3D World Map 2.1

See many cities and countries worldwide online

Publisher: Longgame  Rating: 6.7 out of 10 (199 votes)

Solar System 3D Simulator 3.0

App designed to help learn more about the solar system

Publisher: Sciencefair-projects  Rating: 7.2 out of 10 (125 votes)

PyMOL 1.1

Create high-quality 3D images of small molecules and other biological creations

Publisher: DeLano Scientific LLC  Rating: 6.8 out of 10 (10 votes)

Celestia 1.6.1

3D space simulation in real time with massive star database

Publisher:   Rating: 7.5 out of 10 (208 votes)

Satscape 2.02

Know where satellites are at any given time for free

Publisher:   Rating: 7.3 out of 10 (18 votes)

Moonphase 3.3

Free software that tracks the phases of the moon 

Publisher: Tingan  Rating: 6.7 out of 10 (51 votes)

WorldWide Telescope Beta

A scientific sandbox that allows users to explore the night sky and celestial objects

Publisher: Worldwidetelescope  Rating: 6.7 out of 10 (67 votes)

SkyMap Pro 7

View maps of the sky to learn about constellations, stars and other details 

Publisher:   Rating: 7.6 out of 10 (16 votes)