Astropy
The community-developed core Python package for astronomy, coordinates, time, units, tables, and scientific data.
ESA SNAP
ESA’s open-source desktop platform and toolboxes for processing Sentinel and other Earth-observation data.
Orfeo ToolBox
An Apache-licensed toolkit from CNES for large-scale remote-sensing image processing in C++, Python, and command-line workflows.
QGIS
A free and open-source geographic information system widely used for Earth-observation and geospatial analysis.
SPICE-enhanced Cosmographia
A free NASA/JPL mission-visualization application for SPICE-driven trajectories, attitudes, instruments, and observation geometry.
CesiumJS
An Apache-licensed JavaScript library for high-precision 3D globes, time-dynamic visualization, and geospatial web applications.
NASA/JPL SPICE Toolkit
NASA/JPL’s free toolkit and data system for mission geometry, ephemerides, observation planning, and science operations.
NASA Open MCT
A web-based, open-source mission-control and data-visualization framework developed at NASA Ames.
SatNOGS
An open-source global satellite ground-station network, client stack, and public transmitter database.