List of weakness
themail.com
Found at: http://themail.emailonyoursite.com/signup/
Well, position is not permanent, but bad color management make all noise just funny.
nnm.ru
Found at: http://www.nnm.ru/registration.html
Nice CAPTCHA with several weak places: arithmetic operations are not realy an obstacle. Bad noise, easy to remove. Same font, same size, same position. It helps a lot :)
mail.netman.ru
Found at: http://mail.netman.ru/register/?agree=yes
At least CAPTCHA which made with thinking about how it may be beated. Weakness: bad color model, no noise, several fonts, several sizes.
Euro DNS
Found at: http://www.eurodns.com/whois/whoiswindow.php?domain=eurodns.com
Super easy. Same font, same position, same size, no noise.
ua.fm
Found at: http://ua.fm
Strong enough CAPTCHA (for this list I mean :)). Weak noise, bad fonts.
mail.bigmir.net (ver 0.1)
Found at: http://mail.bigmir.net/reg.php
Too easy to speak about.
coolgoose.com
Found at: http://www.coolgoose.com/signup/
Strong enough. Weakness: bad noise, one font.
- F.A.Q.
Q: What does this list include?
A: This is the list of CAPTCHAs we found, which are easy to break, and we are either already broke it or we are absolutely sure we can do this.Q: What do you mean telling "broke"?
A: This mean that we have working application which takes image and outputs the text written on it with accuracy which allows to make automation process reasonable (or we sure we can do this).Q: Can you check CAPTCHA on my site and tell me it it's secure enough?
A: Yes, we can. Contact us.