Free, open source screen saver run by 1000s. Install on PC or Mac; when computers "sleep", screen saver starts, & computers communicate via web to collaboratively create morphing, abstract animations known as 'sheep;' a collective 'android dream.'
G. Caldarelli, A. Capocci, and D. Garlaschelli. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)