Astropy
The community-developed core Python package for astronomy, coordinates, time, units, tables, and scientific data.
Orfeo ToolBox
An Apache-licensed toolkit from CNES for large-scale remote-sensing image processing in C++, Python, and command-line workflows.
RocketPy
An MIT-licensed Python library for high-power rocket trajectory, weather, dispersion, and six-degree-of-freedom simulation.
SU2
An open-source multiphysics simulation and design suite for CFD, aerodynamic analysis, and shape optimization.
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 Core Flight System (cFS)
NASA Goddard’s open-source flight-software framework bundle and common applications for spacecraft systems.
F Prime
NASA/JPL’s component-driven, open-source framework for spaceflight and embedded software applications.
NASA Operational Simulator for Space Systems (NOS3)
A NASA open-source digital-twin and software-simulation environment for spacecraft integration and test.
NASA Trick Simulation Environment
NASA’s open simulation environment for model integration, execution control, data recording, and analysis.