itch.io

One of a kind game engine for a new generation of developers.

Open Source 3D Game Engine

8-bit game creator tool for Windows

3D Game Engine for Blender

An easy 3D desktop Game Engine scriptable in Python.

simple web-based free and open-source visual novel editor, it can be used in web browser.

microStudio game engine, easy to learn, packed with features

A multimedia sketchbook

Free and open source 2D and 3D game engine