Wine - Open Source Software for running Windows applications on other operating systems.
JoyToKey - JoyToKey enables users to control the keyboard using any USB compatible controller (Dualshock 3, Xbox 360, etc.)
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.
Controller Companion - Control your PC desktop with a game controller!
WineBottler - WineBottler is an App to manage and wrap your Windows apps into convenient OS X apps.
Thincast Workstation - The world's fastest Graphics-Accelerated Desktop Virtualization solution with full DirectX 12.1 / Vulkan 3D API support!