Captcha-Plugin for Rails

A simple CAPTCHA implementation for Rails 5+ based on RMagick.

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

A simple and custom captcha for Rails3.

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

This plugin adds helpers for the YinXiangMa CAPTCHA API

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.

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

Rails mountable engine, that provides captcha support

IQ, Math Captcha

My version of SimpleCaptcha

dongsx

A library to make creating negative captchas less painful

It's a Rails Captcha Engine for Rails 3 applications.

Generates and verifies ascii art captcha.

Death by Captcha Ruby implementation (HTTP API)

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

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

A honeypot style captcha extension for ActiveRecord. Simple one-line inclusion in the model combined with a simple form field should trap the bad guys in the molasses.