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.

NASA/JPL SPICE Toolkit

NASA/JPL’s free toolkit and data system for mission geometry, ephemerides, observation planning, and science operations.

F Prime

NASA/JPL’s component-driven, open-source framework for spaceflight and embedded software applications.

NASA Open MCT

A web-based, open-source mission-control and data-visualization framework developed at NASA Ames.

Yamcs

An open-source mission-control framework for telemetry, commanding, automation, and spacecraft operations.

OpenC3 COSMOS Core

A free, source-available command-and-control stack for hardware integration, telemetry, commands, scripts, and dashboards.