GDevApp - Create your own games with GDevelop: an open-source game creator. No programming skills are required! Quickly build and share your games on mobile (Android and iOS), desktop and on the web.
Godot Engine - Feature-packed 2D and 3D open source game engine.
RPG Paper Maker - Website
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
Open RPG Maker - Open RPG Maker is a free and open source clone of features from the RPG Maker series (i.e.
Unity - The multiplatform game creation tools for everyone.