Pygame

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Godot Engine

Three.js is a free and open-source JavaScript 3D library. The aim of the project is to create an easy to use, lightweight, 3D library with a default WebGL renderer. The library also provides Canvas 2D, SVG and CSS3D renderers in the examples.

ct.js is a 2D game editor that makes learning programming fun and game development easy by its visual tools, good docs and flexible, modular library. ct.js is based on Pixi.js, works on WebGL and provides great performance in browsers and desktop environments. The game editor is extensible through the use of Modules which adds new powers when ct.js core is not enough. Hobyist and professionals alike use ct.js to create 2D shooter, arcade, adventure, survival and puzzle games.

Torque 3D is a premier open-source game engine. Torque 3D includes both a high-performance forward-rendering basic lighting engine, and a deferred-rendering advanced lighting mode. A plugin system for physics, and networking capabilities with a server authoritative networking model, used for multiplayer games. The game engine has been used to create everything from driving simulators to MMOs to first-person shooters.

GDevelop is a 2D cross-platform, free and open-source game engine that takes visual programming to the next level. GDevelop allows you to take read-made behaviours and add them to your game objects or create new once with intuitive and east to use events. With GDevelop, it is easy to make games for PC and Mobile, as well as launch HTML5 games playable right in your web browser.

The Unreal Engine is a game engine and suite of tools and technologies developed by Epic Games. The engine was first released in 1998 as a part of the first-person shooter game Unreal, where the game itself was built on the engine. Today the Unreal Engine has grown into an ecosystem that includes a marketplace for game assets that can help indie developer to develop games and make a living selling game assets them selves. The Unreal Engine is free to use and provides a revenue-share model for developers and has been used to tipple A studios and indie developers to create games in almost every genre, including platformers, fighting games,RPGs, MMORPGs, and many more.

Unity is a cross-platform game engine and development platform created by Unity Technologies. With Unity game developers can build high-quality 3D and 2D games, deploy them across mobile, desktop, consoles, VR/AR or the Web. Unity was first released as OS X-exclusive game engine but as of 2018 the engine had been extended to support more than 25 platforms.