Stereogranimator at the New York Public Library site to create hypnotic, animated gifs or 3D anaglyphs (red and blue viewing specs required for the latter)..
A stereograph was one of the earliest innovations in 3D photography. It works by melding two near identical images through the use of a two-lensed apparatus called a stereoscope.
Here is mine:
Made in a minute.
The stereographs are mostly dating from the 19th century ,but there are over 40 000 to choose from.
It makes a quick enjoyment.