This version include two important page 'Contact' and 'Register' with the 'Math-Captcha' method submit for prevent hacker attack.

A captcha that uses images instead of garbled text

Captcha generator for rails

This is a gem wrapper for tiny captcha in C with no dependencies.

Description of RailsCaptcha.

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

0-9 arası sayıları kullanarak random olarak 2 sayı seçer ve yine random olarak toplama ya da çarpma yaparak sonucu verir.

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

IQ, Math Captcha

dongsx

Metabypass | Ruby-based easy implementation for solving any type of captcha by Metabypass

API to interact with BrandCAPTCHA http://www.pontamedia.com/en/brandcaptcha/

Simple negative captcha for Rails

Generates and verifies ascii art captcha.

Simple negative captcha for Rails

Merb plugin that provides resource access rate limits and captcha'ing

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

you will get arithmatic sum with answer you just have to compare with ur user in controller

Integrate the AreYouAHuman.com CAPTCHA alternative human verification into your Ruby/Rails application

Implements view helpers for the ASIRRA CAPTCHA system for Rails-based websites