Service Alert
Unity: Unity’s industry-leading engine provides tools to create and operate amazing games and other real-time interactive experiences and publish them to a wide range of devices. And Unity has a two free plans: Student and Personal.
Genially: Genially is a cloud-based platform for building interactive learning and communication experiences.
Flowlab: Visual game creator, right in your browser. No coding needed - Export apps for iOS, Android, Windows, Mac, & more. There is a free option to get you started.
Gamemaker: GameMaker makes game design easy, regardless of your background or skill level. All you need is an idea!
Godot: Free, open source game engine.