PHP captchas samples.

...Comming Soon.

http://www.phpcaptcha.org/try-securimage/
http://www.puremango.co.uk/freecap14/freecap_wrap14.php
http://www.captcha.fr/index.php?page=2&langue=en&PHPSESSID=caa9c81ef98de688935e947ec5fdfa76