Description: Cartes du Ciel (Skychart) is a free, open-source planetarium software that allows users to map and track celestial objects like stars, planets, comets, etc. It offers features like telescope control, imaging capabilities, catalogues and simulations.
Type: software
Pricing: Open Source
Description: StarCalc is a free, open-source spreadsheet program similar to Microsoft Excel. It has many of the core spreadsheet features like formulas, charts, pivot tables, and data analysis tools. StarCalc is lightweight, customizable, and available on Windows, Mac, and Linux.
Type: software
Pricing: Open Source