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 with no hassle. The editor, language and APIs are feature rich, yet simple to learn, allowing you to become productive in a matter of hours.
Godot has been developed by Juan Linietsky and Ariel Manzur for several years, and was born as an in-house engine, used to publish several work-for-hire titles. Development is sponsored by OKAM Studio (http://www.okamstudio.com).
Documentation has been moved to the GitHub Wiki.
Binary downloads, community, etc. can be found in Godot homepage:
Compilation instructions for every platform can be found in the Wiki: https://github.com/okamstudio/godot/wiki/advanced