#1 super security anti-spam captcha plugin for WordPress forms.
Captcha Bank is an easy to use wordpress security plugin to prevent spam on your site while letting real people pass through with ease.
Stop spam bots from registering, logging in, filling out contact forms and commenting on your site without using annoying Captcha codes or puzzles.
Captcha Booster is an effective and powerful plugin that protects you from spam, bots or automated scripts with bullet-proof validations.
CH Captcha use for Add captcha to WordPress on contact form 7.