Authimage 100% Vendor site:
https://www.gudlyf.com/index.php?p=376
Weaknesses: constant font, aligned glyphs, constant glyph position, constant rotation, no deformation, non-textured background, constant colours, no perturbation.
Clubic 100% Weaknesses: constant font, no rotation, no deformation, aligned glyph, constant background, weak colour variation, weak perturbation.
linuxfr.org 100% Weaknesses: constant font, aligned glyphs, no rotation, no deformation, non-textured background, weak colour variation, weak perturbation.
LiveJournal 99% Weaknesses: constant font, constant character position.
lmt.lv 98% Weaknesses: constant font, almost aligned glyphs, no rotation, no deformation, constant background, no colour variation, weak perturbation.
Ourcolony 100% Weaknesses: constant font, no rotation, no deformation, no colour variation, no perturbation
Paypal 88% Weaknesses: constant font, almost aligned glyphs, no rotation, no deformation, constant background, no colour variation, no additional perturbation.
phpBB 97% Vendor site:
https://www.phpbb.com/
Weaknesses: constant font, no rotation, no deformation, constant colours, weak perturbation.
SCode and derivatives 100% Vendor site:
http://james.seng.cc/archives/000145.html
Weaknesses: at most 3 different fonts, no rotation, no deformation, weak colour variation, useless perturbation (separate colour key).
Slashdot 89% Weaknesses: constant font, no deformation, constant colours, weak perturbation.
vBulletin 100% Vendor site:
https://www.vbulletin.com/
Weaknesses: constant font, fixed glyph position, no rotation, no deformation, almost constant colours, weak perturbation.
Xanga 49% Weaknesses: fixed horizontal glyph position, no rotation, no deformation, constant colours, insufficient perturbation