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Aerospace engineering

LibreOrbit is an open-source, modular satellite networking operating system designed to connect satellites, ground stations, sensors, edge devices, and communities through open and interoperable space infrastructure. Built with a plugin-based architecture and licensed under AGPL-3.0+, LibreOrbit provides a foundation for satellite communications, mission operations, data exchange, autonomous systems, and future space networks. https://roxanneardary.com/libreorbit/

Geometry for fluid dynamics

APAD (Airplane Performance and Aerodynamics Designer) is an offline tool helping airplane designers with typical performance and filght characteristics calculations.