dgVoodoo2

Glide/DirectX implementation on D3D11/12

Play your old Glide and DirectX games even on the latest, modern version of Windows.
Good compatiblity with the original libraries, I think.
You can force the resolution and even MSAA for both Glide and DirectX which can really improve the appearance of games with hardwired low-resolution support.
Support for hw/driver compatibility with some really old videocards like GF4 Ti4800 and ATI Radeon 8500 is also available for rare games needing it
You can force windowed appearance and simple color-management and dithering (retro feeling) as postprocess effects
For really old games running at their original low resolution you can upscale the image with various resampling filters like bicubic and lanczos
You get a lot of configurable elements, either through the GUI CPL app or manually with a texteditor, if you know what you are doing