Stellarium

Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. It is available for Linux/Unix, Windows, macOS and Haiku. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope.

Stellarium website.

JavaScript planetarium engine

Tools & script for generating data files for Stellarium

Sky Cultures for Stellarium

Bridge tools to combine Stellarium's skies with the interactivity of the Unity game engine

Repository for packaging Stellarium into PPA (https://launchpad.net/~stellarium)

A converter from legacy sky culture format to the new one

Startpoint for the dynamic plugin development. Based on the HelloStelModule plugin.