Nintendo 3DS

The 3DS is capable of displaying steroscopic 3D effects without the use of 3D glasses.

Citra

Citra is an open-source emulator for the 3DS. Some of the features that Citra has accomplished so far is the ability to upscale graphics so that games look better. While this emulator can emulate games, the speeds and accuracy are not quite up to par with an actual 3DS but still a good work in progress.