"Graffiti Analysis is an extensive ongoing study in the motion of graffiti. Custom software designed for graffiti writers creates visualizations of the often unseen motion involved in the creation of a tag. Motion data is recorded, analyzed and archived in a free and open database, 000000book.com, [...] All tags created in Graffiti Analysis are saved as Graffiti Markup Language (GML) files, a new digital standard used by other popular graffiti applications such as Laser Tag and EyeWriter. Graffiti Analysis 2.0 is an open source project that is available online for free in OSX, Windows and Linux."

Die Software: http://graffitianalysis.com/
iPhone edition: http://graffitianalysis.com/iphone/
Digital Blackbook: http://000000book.com/

Evan Roth ist übrigens u.a. Gründer des Graffiti Reseach Lab: http://graffitiresearchlab.com