SimpleCaptcha is available to be used with Rails 3 or above and also it provides the backward compatibility with previous versions of Rails.

Anti-spam protection for your website

Helps humankind with simpler captchas

SimpleCaptcha is available to be used with Rails 3 or above and also it provides the backward compatibility with previous versions of Rails.

RedisCaptcha provides simple captcha that can be read by human.

MVC based Math, Logic Captcha

Death by Captcha Ruby implementation (HTTP API)

This is mt first gem

SimpleCaptcha is available to be used with Rails 3 or above and also it provides the backward compatibility with previous versions of Rails.

Forked from https://github.com/kares/simple_captcha

Generates and verifies ascii art captcha.

Rails mountable engine, that provides captcha support

dongsx

My version of SimpleCaptcha

IQ, Math Captcha

SimpleCaptcha is available to be used with Rails 3 or above and also it provides the backward compatibility with previous versions of Rails.

Form protection with simple captcha calculations.

Due to many unrequited complaints to the recaptcha team with regard to its unreadability for real human users, this gem offers a more readable selection of captcha images.

This plugin adds helpers for the YinXiangMa CAPTCHA API

Despamilator is a plugin based spam detector designed for use on your web forms borne out of two annoyances: Spam being submitted in my web forms and CAPTCHAS being intrusive. Despamilator will apply some commonly used heuristics from the world of anti-spam to help you decide whether your users are human or machine.