Construct 2
Godot Engine
GDevelop
Unreal Engine
BYOND
Corona SDK
Defold Engine
Unity
AppGameKit
Godot Engine
MonoGame
BYOND
ct.js
Corona SDK
RPG Maker
Unreal Engine
Godot Engine - Feature-packed 2D and 3D open source game engine.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
MonoGame - MonoGame is an open source implementation of the Microsoft XNA 4 Framework.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
BYOND - BYOND is the premier community for making and playing online multiplayer games.
ct.js - ct.js is a 2D game editor (desktop app) based on web technologies.