A new version of Wine, an Open Source implementation of the Windows API on top of X and Unix, has been released.
With DS4Windows its possible to emulate a XBox 360 controller with a Dualshock 4 controller.
A new version of QEMU, an open source machine emulator for various CPUs, has been released. QEMU is available for Windows (32 a. 64 Bit), MacOS (10.7 recommended) and Android.
DOSBox-X is a fork of DOSBox. It has a focus on accurate emulation of the hardware and many more ways to tweak and configure the DOS virtual machine. You can download it here.
With MEMU it´s possible, to play android games on Windows.
A new version of the controller emulator x360ce is available.
dgVoodoo 2 is a free wrapper for old graphics API's for Windows Vista/7/8/10.