Edgar Müller

http://en.wikipedia.org/wiki/Edgar_M%C3%BCller

Julian Beever

http://en.wikipedia.org/wiki/Julian_Beever

3d Chalk

https://www.google.com/search?tbm=vid&hl=en&source=hp&biw=1024&bih=653&q=3d+Chalk+Illusion

eChalk optical illusions

http://www.echalk.co.uk/amusements/opticalillusions/illusions.htm

Fun House

http://visualfunhouse.com/

Kids

http://kids.niehs.nih.gov/games/illusions/index.htm

Works

http://www.illusionworks.com/

MO

http://www.moillusions.com/

4D Building Projection Singapore optical illusions

Great / Grand

http://www.greatillusions.info/
http://www.grand-illusions.com/opticalillusions/

Optical

http://www.optical-illusions.info/
http://www.optillusions.com/
http://www.123opticalillusions.com/archive.php
http://www.optical-illusion-pictures.com/gallery.html

Visual

http://www.visualillusion.net/