http://reachadvisors.typepad.com/
Music Wall
Leaves floor
http://myopencv.wordpress.com/
http://www.shiffman.net/p5/kinect/
Maybe light detection library
http://inthistogram.altervista.org/
http://www.v3ga.net/processing/BlobDetection/index-page-home.html
http://s373.net/code/flob/flob.html
http://code.google.com/p/blobscanner/
Face recognition/blob detection
http://ubaa.net/shared/processing/opencv/
Examples:
http://www.fadstudio.us/
Library:
http://cellularautomata.fadarch.com/
http://sites.google.com/site/blobscanner/Download
http://www.interaction-design.org/encyclopedia/interaction_design.html
http://www.jaist.ac.jp/~uehara/etc/origami/nets/index-e.html