Contact form with captcha plugin allows you to use a Google reCAPTCHA contact form on your blog. It requires PHP 5.0 or later.
Captcha Bank is an easy to use wordpress security plugin to prevent spam on your site while letting real people pass through with ease.
WP Easy Contact provides a very easy to use contact form which collects, displays, and stores the collected information.
Smooth Ajaxified Contact form that sends the data to email with spam control, database save option, form styling option and admin settings.
Stop spam bots from registering, logging in, filling out contact forms and commenting on your site without using annoying Captcha codes or puzzles.