OpenSpace - OpenSpace is open source interactive data visualization software designed to visualize the entire known universe and portray our ongoing efforts to investigate the cosmos.

SkyView - SkyView is powerful, easy-to-use app that answers questions about stars, constellations, and more.

Celestia - Real-time 3D visualization of space

Stellarium - Stellarium is a free open source planetarium for your computer.

SkEye - SkEye is an advanced Planetarium that can also be used as a PUSHTO guide for telescopes.

Space Engine - Space Engine is a realistic virtual Universe you can explore on your computer.