Free Captcha Downloads
NuCaptcha is the most secure and most usable captcha solution on the Internet. You will no longer frustrate your site visitors with impossible to read captchas. With NuCaptcha they will easily be able to see the code and your site will be safe.Programming API's
NuCaptcha Client Library APIs.Platform Plugins
The easiest way to use NuCaptcha is with a Plugin for platforms such as WordPress.Custom Skins
Are you a NuCaptcha Pro user? Here are some sample custom skins you can use.