Top Free and Premium Captcha Plugins /Extensions for Drupal
There is possibly no better and effective spam control techniques than using Captcha drupal modules. These modules have a list of stated challenges, which may include match CAPTCHA, text based CAPTCHAs as well as lost character and phrase CAPTCHAs which are also parts of text CAPTCHAs.
CSS CAPTCHA drupal modules allows changing the order of elements when coupled with a CSS enabled website and browser. The CSS CAPTCHA uses a code to scramble up the markup. The ASCII art CAPTCHA is even more effective as it employs random character codes presented in ASCII art style. The Meta CAPTCHA style is mainly the Random CAPTCHA that picks any random CAPTCHA from all the enable options which come with the module. The more advanced CAPTCHA modules include all of these challenges along with the more superfluous but nonetheless ubiquitous “Foo” CAPTCHA; here the user is merely required to input “foo” in the text box.
For the best Drupal Captcha Modules visit the BestPlugin module lists which provide the best anti-spam solution and save your site from being bombed by spam messages and applications.