The New York Public Library web site has a tool that lets you take stereo photos, and convert them into a single moving, apparently 3-D, image. An example is shown here. They invite you to:
Create and share animated GIFs and 3D anaglyphs using more than 40,000 stereographs from The New York Public Library.
Joshua Heineman is the key person who inspired this, says the Library. The web site gives lots of detail.
[via metafilter]