Construct 2 - Scirra Construct is a 2D game development engine with a focus on building games visually.
Godot Engine - Feature-packed 2D and 3D open source game engine.
MonoGame - MonoGame is an open source implementation of the Microsoft XNA 4 Framework.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
Unity - The multiplatform game creation tools for everyone.
Blacksmith 2D - Black is a highly optimized 2D framework for web, mobile games, and playable ads.