Unreal Development Kit is described as '"UDK is Unreal Engine 3 – the complete professional development framework. All the tools you need to create great games, advanced visualizations and detailed 3D simulations. The best tools in the industry are in your hands' and is a game development tool in the development category. There are more than 25 alternatives to Unreal Development Kit for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best Unreal Development Kit alternative is Godot Engine, which is both free and Open Source. Other great apps like Unreal Development Kit are Unity, Unreal Engine, GDevelop and CRYENGINE.
AresEd is a high-level and fully featured 3D game creation suite. It is Free and Open Source. When it is finished you will be able to make full 3D games without writing any code (although a fallback to the python scripting language will be provided).
Netherlands
EU