Adventure Game Studio (AGS) is an open source adventure game studio.

Cocos2d-x is an open-source and cross platform open source free 2D game engine for mobile game development known for its speed, stability, and easy of use.

CryEngine is a game engine with the initial version being used in Far Cry, and continues to be updated to support new consoles and hardware for their games.

GDevelop is an open source game creation software.

Godot is an advanced, feature-packed, multi-platform 2D and 3D open source game engine.

Polycode is a C++ and Lua framework for building interactive applications. It is free, open source and cross-platform.

Blitz3D is a classic game programming language for PC.

Construct Classic is a free, DirectX 9 game creator for Windows, designed for 2D games. It is the predecessor to the more modern Construct 2.

LateralGM (LGM) is an alternate Game Maker IDE founded by IsmAvatar that is compatible with both ENIGMA and Game Maker.

Game Editor is a 2D game authoring package. It supports multi platform development to iPhone, iPad, Mac OS X, Windows (Windows 95-Windows 10), Android, Linux,…

Playir is a mobile app and game creation platform, that allows you to create your own games and apps from pre-made templates.

RPG Maker (RPG Tkool) is a series of programs for the development of role-playing games (RPGs).