Migadu - Platform to host multiple email domains.
Unity - The multiplatform game creation tools for everyone.
Uniregistry - Uniregistry is a domain names registration services company, operating a registrar, a registry, and a premium domain sales operation
Godot Engine - Feature-packed 2D and 3D open source game engine.
123-reg.co.uk - 123-reg provides domains names, web hosting, email and website building tools.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.