Godot is a powerful cross-platform game engine
An iOS & tvOS Frontend for Multiple Emulators
The game engine for everyone
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Urho3D Game engine
Everything you need to build and deploy scalable realtime 3D apps
New Godot bindings for Swift
The AWS GameKit Plugin for Unreal
GemRB is a portable open-source implementation of the Infinity Engine
Orx: Portable Game Engine
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Cinema Enters Game Console
2D Game Engine
ZED OS the clone of Windows XP
Sdk library for creating 2048 game in c#.
Cross-platform 2D and 3D game engine
Character animation system for games and simulations.
online 4X browser game engine
3D .NET engine for Windows, Linux, Mac
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Egret is a brand new open mobile game and application engine
2D physics engine for games