Character models: Microsoft Rocketbox Avatar Library (MIT License) https://github.com/microsoft/Microsoft-Rocketbox
Textures recoloured and optimised for web use.
Surface textures: TextureCan Fabrics 0057 and ambientCG Fabric023, Plastic013B (CC0) https://www.texturecan.com https://ambientcg.com
Voices: generated with Kokoro TTS (Apache License 2.0) https://github.com/hexgrad/kokoro
3D engine: three.js (MIT License) https://threejs.org
Ambient occlusion: N8AO (CC0) https://github.com/N8python/n8ao
Aircraft interior: A320-family interior 3D model by formform on CGTrader (Royalty Free License), optimised parts only
Fonts: Chakra Petch, Barlow, JetBrains Mono (SIL Open Font License 1.1) via Fontsource