Copernicus
NASA’s high-fidelity trajectory design and optimization system for Earth, lunar, libration-point, and interplanetary missions.
PyKEP
ESA’s open research toolbox for interplanetary trajectory design, Lambert problems, and low-thrust optimization.
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.
OpenVSP
NASA’s open-source parametric aircraft geometry tool for conceptual design and engineering analysis.
SPICE-enhanced Cosmographia
A free NASA/JPL mission-visualization application for SPICE-driven trajectories, attitudes, instruments, and observation geometry.
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.