Repackaged visualCaptcha's backend service, including translation and minor modification. Mainly for private use. Everything still belongs to original author: emotionLoop.

Description of RailsCaptcha.

HumanDetector is a friendly logic captcha for Rails the doesn't require any external system dependency (e.g. external captcha API connections). It uses a simple question that any 7 or more years old human can understand, but that a spambot will not be able to answer. This Gem supports Ruby v1.9.2 and Rails 3.0.x.

Captcha based on encyrpting and decrypting user data by mathematical operation

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

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

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

Quick little arithmetic plain-text captcha

This plugin adds helpers for the YinXiangMa CAPTCHA API

RedisCaptcha provides simple captcha that can be read by human.

Solve Media CAPTCHA Replacement

RMagickCaptcha is a gem that implements captcha for using in Rails application.

This library can help you create a captcha in your terminal application, which may be damaged by a large influx of requests.

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

create captcha for api based project

Simple captcha image generator gem

jQuery slide captcha system with jQuery & jQuery UI for Rails 3

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