Vulkan
Vulkan is a new generation graphics and compute API that provides high-efficiency, cross-platform access to modern GPUs used in a wide variety of devices from PCs and consoles to mobile phones and embedded platforms.
19 Alternatives To Vulkan
Microsoft DirectX
Describes how to obtain the latest version of DirectX to enable games and multimedia applications on your system.
MonoGame
MonoGame is an open source implementation of the Microsoft XNA 4 Framework.
Unreal Engine
Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
irrlicht
This caused the Irrlicht homepage and forum to work badly. Over the last days most things started working again – except the forum continues to be broken. Old posts can be read but everything else is currently not working.