Captcha Free
Captcha Version : 1.0
Captcha Features : Captchafree is a simple test that distinguishes between an automated computer program or "bot" and a real human.and It's provides CAPTCHA functionality to any website running on a PHP-enabled web host.
Captcha Home Page : http://www.php.meezerk.com/index.php?page=captcha_download
Captcha Tryout :
Comments
This captcha requires bcmath as well as gd2 to work.
bcmath is not turned on by default on some php configurations.