This plugin allows you to implement Google Captcha into web forms.
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.
Math Captcha is a 100% effective CAPTCHA for WordPress that integrates into login, registration, comments, Contact Form 7 and bbPress.
The Add new recaptcha google plugin allows you to implement a super security REcaptcha form into web forms.
This antispam plugin provides very simple(one-click) and powerful captcha for your blog.
An easy to use wordpress Captcha plugin to prevent spam on your site. You can use Image Captcha to protect comments and the admin panel.