The New York Public Library has a massive collection of over 40,000 vintage stereographs (two photos taken from slightly different points of view). To properly share them with the world in 3D, the library has launched a new tool called the Stereogranimator. It lets you convert an old stereograph into either an animated 3D GIF (which uses “wiggle stereoscopy“) or an anaglyph (the kind that requires special glasses).
Here’s some sample GIFs created by people around the world using the tool:
You can find a gallery of images other people have made here.