Godot is a fully featured, open source, MIT licensed game engine. It focuses on having great tools, and a visual oriented workflow that can export to PC, Mobile and Web platforms. It is a cross-platform 2D and 3D game engine and game development IDE. You can port your game to run on Windows, Linux, Mac OSx/iOS, BSD, Android, BlackBerry 10, HTML5, PlayStation 3, PlayStation Vita, and Nintendo 3DS.
Visual editor, full of mature tools.
Uncluttered UI, with context-sensitive editors.
Amazing scene system, supporting instancing and inheritance.
Friendly content creation interfaces for artists, level designers, animators, …
Visual shader editing for 2D and 3D.
Persistent live editing (changes are not lost after stopping the game). Live editing on mobile devices!