Reality Factory - Reality Factory is a free suite of game development tools for building 3D games.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
CraftStudio - CraftStudio lets you craft games from scratch in real-time over the Internet.
Game Editor - Game Editor is the open source game design software that gives you the power to create the games of...
Limon Engine - Limon is a multi platform 3D game engine mainly focusing on first person games.
Godot Engine - Feature-packed 2D and 3D open source game engine.