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.
TheThe CAPTCHA uses two easily understood types of tests (generated graphics and simple math logic) to block both registration form spam and comment spam.
Choose from a number of colors, sizes, and symbols to customize TheThe CAPTCHA for your website. WP MU is fully supported.
This plugin is povided for FREE by WordPress Themes Club TheTheFly.Com.