Unity #

Godot #

Godot is a 2D and 3D, cross-platform, free and open-source game engine. The development environment runs on multiple operating systems including Linux, macOS, and Windows. Godot can create games targeting PC, mobile, and web platforms.

LÖVE #

LÖVE is a Free and Open-Source framework to make cross-platform 2D or 3D games.

Azul3D #

Azul3D is a 3D game engine written in Go.

Dash engine #

Dash engine is an Open-Source 3D game engine written with the D language.