This plugin allows you to implement Google Captcha into web forms.
Captcha Bank is an easy to use wordpress Captcha plugin to prevent spam on your site while letting real people pass through with ease. It's more
This plugin allows you to implement super security captcha form into web forms.
Keep spam bots out of your site without annoying Captcha codes, puzzles or faulty blacklists. Enterprise spam protection for sites of all sizes.
Add Google's reCAPTCHA to any custom form.
The Add new recaptcha google plugin allows you to implement a super security REcaptcha form into web forms.
This Plugin provides very simple and powerful captcha for your blog with wide variety of captcha methods and models.
TheThe CAPTCHA is a WP plugin that blocks spam from comment boards and registration forms by generating simple tests that only humans can easily pass.