Define questions and answers in a YAML file and validate your models with a single line of code. No more captchas or other stupid tricks.

Form protection with simple captcha calculations.

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

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

Captcha generator for rails

This gem enable to use Captchme. Anti spam, Monetize captcha and Audience qualification

Solve Media CAPTCHA Replacement

Simple captcha image generator gem

Anti-spam protection for your website

Ruby port of VIT AutoCaptcha

Description of RailsCaptcha.

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

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

This is mt first gem

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

Russian Post tracking toolset, consisting tracking form bot (since Russian Post is too retarded for normal API) and captcha solver/recognizer.

Simple captcha

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

A simple and fast image captcha generator that uses opencv and memcached.

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