Don't make your users prove their human with annoying CAPTCHA. SpamWrecker is a PHP form processor that works with your existing contact form. Security involves 8 layers of protection, 100% guaranteed to stop spambots. Spamlogs containing information on spam attempts are created and accessible through the admin panel. The processor can be used on multiple forms within your site and can direct forms to multiple recipient email addresses.
Source code is encrypted to prevent spammers from learning our algorithms. This measure alone places SpamWrecker above other solutions which make themselves vulnerable. Installation is simple, upload one folder and open the admin panel. There you can set custom messages for failure, success and email subject as well as other characteristics. Requires PHP 5.4 or better.