Alternative apps to Unity:
-
The Unigine SDK allows the development of 3D graphics software for simulation, visualization, scientific research, video games, virtual reality systems and more.
- Freeware
- Windows, Linux
-
The Adobe AIR runtime enables developers to use HTML, JavaScript, Adobe Flash software, and ActionScript to build web applications that run as standalone client applications without the constraints of a browser.
- Freeware
- Windows, macOS, Linux
-
Unreal Engine is now free. Free for game development. Free for Virtual Reality. Free for education. Free for architecture. Free for film.
- Freeware
- Windows, macOS
-
The most powerful game development platform is now available to everyone. Full engine source code. All features. No royalties. No obligations. No license fee.
- Freeware
- Windows
-
The Godot Engine is a free, all-in-one, cross-platform game engine that makes it easy for you to create 2D and 3D games.
- Freeware
- Multiple OS
-
Open 3D Engine (O3DE) is a multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations without any fees or commercial obligations.
- Freeware
- Windows
-
Doomsday Engine is a Doom / Heretic / Hexen port with enhanced graphics.
- Freeware
- Windows, macOS, Linux