Wine - Open Source Software for running Windows applications on other operating systems.
D9VK - A d3d9 to vk layer based off DXVK's codebase.
CodeWeavers CrossOver - Don't buy a Windows license, don't reboot and don't use a Virtual Machine. Try a free trial of CrossOver to run your Windows software on Mac, Linux and Chrome OS.
DXVK - Vulkan-based D3D11 implementation for Linux / Wine
WineBottler - WineBottler is an App to manage and wrap your Windows apps into convenient OS X apps.
DXUP - A D3D10 -> D3D11 Translation Layer