#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.
PlusCaptcha - The Easiest Captcha to Setup and Execute, with an Auto-Setup Feature! Trusted by thousands of blog, e-commerce, and government sites!
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.
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.
The Add new recaptcha google plugin allows you to implement a super security REcaptcha form into web forms.