ENG. This addon lets you code with nodes inside Blender Game Engine like blueprints in Unreal.Here are the links for free download and an introductory video (Installing and getting started). 
ITA. Questo addon permette la programmazione all’interno di Blender Game Engine attraverso nodi come blueprints in Unreal. Di seguito i link per il download gratuito e un video introduttivo (Installing and getting started). 


Link: Download Logic Nodes Addon
Link: Installing and getting started