GoldBox is a Propriety Game Engine developed by SSI (Strategic Simulation Inc.) in 1988. This engine is written in C/C++ but its initial version was written in Assembly and PASCAL. It developed games for the platforms of Apple II, Apple Macintosh, Amiga, Commodore 64, Atari ST, DOS, NES, NEC PC-9800, and Sega Genesis.
Godot is a cross platform free and open source game engine with MIT (a light license) licensing. It is written in C++ and C# and used to develop 2D and 3D games. The development environment runs on Windows, MacOS and Linux and develops games for platforms like windows, Linux, macOS, iOS, Android, HTML5, WebAssembly and Xbox One.
Gameplay 3D is a Cross-platform game engine used to develop 2D and 3D games. Written in C++, this is used to develop games for Windows, Android, Linux, Blackberry, iOS and MacOSX. The game engine supports Visual Studio, Xcode, CMake, Qt Creator and Android NDK platforms to develop and build the platform.