Gaia Sky is a real-time, 3D, astronomy visualisation software
Siril
A free astronomical image processing software
Marmur
Marble to wirtualny globus i atlas świata — Twój szwajcarski scyzoryk do map, dzięki którym możesz dowiedzieć się więcej o Ziemi i innych planetach.
Stellarium
Stellarium is a free open source planetarium for your computer.
KStars
KStars is a Desktop Planetarium by KDE. It provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time.
Celestia
Celestia – real-time 3D visualization of space