visualCaptcha for Ruby

visualCaptcha for Ruby uses the revamped visualCaptcha "click-to-select" CAPTCHA system to easily distinguish human visitors from spam bots.

For emotionLoop's original "drag&drop image to target area" CAPTCHA system, an unofficial Ruby library still implementing the older visualCaptcha solving mechanism can be found here.

As the original (PHP) library, visualCaptcha for Ruby includes support for mobile devices, Retina graphics, JSON-based configuration files, and an audio fallback system, packaged for visually challenged users.

visualCaptcha is also available for:
PHP
Node.js
Ruby (unofficial)
CodeIgniter
WordPress

Requirements:

• Ruby 1.9.3 or higher
• Ruby 1.9.3 or higher