Polycode is a cross-platform framework for creative code

Dagon is a game engine especially tailored for adventure games and based on open technologies. Featuring a simple scripting language, blazing fast performance and high portability supporting Windows, Linux and Mac OS X, the project aims to become a reference of the genre.

A 3D game engine created by Valve in 2004, and has been used by Valve, third-party companies, and countless community mods by people around the globe

A no-code game engine.

The ABARE ENGINE is a powerful, feature-rich tool built for developers who require top-tier performance and flexibility in their 2D games.

Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.

An engine that allows anyone to design, build, and publish amazing 3D and 2D games

Battle tested 2D game engine with an accessible visual scripting system

A complete 3D authoring tool which includes all the features you need for creating games for multiple platforms

A free, all-in-one platform for game creators

C++ Coding Framework for Windows, Linux, macOS and Browser games

Easy FPS Editor is a tile-based game construction tool designed to make it as easy as possible for anybody to create an old-school fps game. It's powered by a custom engine, built with SFML and OpenGL.

EasyRPG is a community project to create a free, open source, role playing game creation tool, compatible with RPG Maker 2000/2003 games.

A rust, lightweight ECS Game Engine.

"Esenthel" is a mix of words: Essential and Essence, with a touch of magic

The graphics development engine for business and industry

Free cross-platform 3D game engine with C# scripting, Bullet physics and OpenAL audio

A small, 3D game engine/framework in C, with Luajit and Python bindings

A 3D game-maker that makes the creation of your game simple, quick and easy – no coding required

Hazel is a simple-yet-powerful 3D game engine made by Studio Cherno and volunteers, available for use now with big plans for the future.

3D game engine with Hammer style map editor, feature light and LUA scripting support as the standard for coding

An easy to learn game engine for making 2D or 3D games. It prioritizes design and workflow for rapidly expressing ideas.

A simple and easy to use game library for Rust programming language, heavily inspired by raylib.

A no-code, easy to develop game engine

3D game engine written in modern C++ and Vulkan

An engine that provides a WebGL 2D rendering, a web authoring tool for animation production, and a framework to support team development

A fantasy console for making, sharing and playing tiny games and other computer programs

An engine that allows you to build up your own action game with no programming knowledge necessary

A fantasy console by Shmuel and Morgan at CasualEffects for creating and playing retro-style video games on any device.

A C++20 cross-platform game framework, with emphasis on addressing pain points in existing game engines