GeoGebra for Ubuntu is dynamic mathematics software for education in secondary schools that joins geometry, algebra, and calculus. Key features include support for handling points, vectors, variables, as well as the ability to find integrals and derivatives for functions. GeoGebra can be used by anyone who wants to learn and teach mathematics at all levels,

5.0.82 (64-bit)

Stellarium is an open-source planetarium in 3D, available for the three main operating systems, where you can observe the night sky as though you were looking through a telescope. Stellarium brings astronomer-level features to stargazers of all levels of interest. It’s not quite as robust as its competitors, but it’s also a much faster program.

0.13.1 (32-bit)