Solve Media CAPTCHA Replacement

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...

Captcha based on encyrpting and decrypting user data by mathematical operation

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

Description of RailsCaptcha.

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

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

Quick little arithmetic plain-text captcha

create captcha for api based project

MVC based Math, Logic Captcha

RedisCaptcha provides simple captcha that can be read by human.

Death by Captcha Ruby implementation (HTTP API)

A very simple rack captcha middleware via captchator.com API

This is mt first gem

My version of SimpleCaptcha

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

Form protection with simple captcha calculations.

Helps humankind with simpler captchas