The New York Public Library website has an online program that lets you create animated GIFs from old Victorian and early 20th Century stereoscope cards. Try it here
Here are a couple of examples:

It looks like snow, but is actually some sort of foam (probably decomposing algae) blowing in from the sea at Cleveleys near Blackpool.

Put your face (and your friends faces) into a video of the song! link

Some very nice effects in projections on a building in Berlin (promoting a new LG phone).

One of the mechanical sculptures at the Sharmanka Kinetic Theatre in Glasgow. link

We’ve posted other examples of this effect before, but in this installation the audience can control the projection using a microphone.

PERSPECTIVE LYRIQUE from 1024 on Vimeo.

A compilation of every creature animated by Ray Harryhausen in feature films (in chronological order).

The Fabrica art gallery near our school has a new installation by Stephane Cauchy called ‘Cascade’. Buckets connected by pulleys rise and fall as they are filled with water and then empty. link

Tiny origami creations (2-3 cms across) opening slowly on the surface of water (due to capillary action).

Flottille (detail) from Etienne Cliquet on Vimeo.

A delightful project by Davy and Kristin McGuire using a pop-up paper theatre with back-projections.