Godot is a powerful cross-platform game engine
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform 2D and 3D game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Xash3D FWGS engine
GemRB is a portable open-source implementation of the Infinity Engine
The game engine for everyone
New Godot bindings for Swift
A dead simple 2D game engine for Go
An iOS & tvOS Frontend for Multiple Emulators
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Zero Hour running natively on macOS, iPhone & iPad
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Play! - PlayStation2 Emulator
A multi-platform support c++11 library with focus on asio
Cross-platform game engine in Rust
Orx: Data-Driven Game Engine
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Everything you need to build and deploy scalable realtime 3D apps
Urho3D Game engine
The AWS GameKit Plugin for Unreal
Cinema Enters Game Console
2D Game Engine