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

simple stupid captcha

A simple and custom captcha for Rails3.

Captcha generator for rails

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

ReCaptcha implements view helpers to generate ReCaptcha code, with the noscript counterpart, required methods that interface with the HTTP API for captcha verification, a DSL to generate a before_filter and the code to implement AJAX captcha validation.

Captcha-Plugin for Rails

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

Captcha-Plugin for Rails

A smart captcha library

A very simple rack captcha middleware via captchator.com API

Submit captcha images and retrieve the text as a string.

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

Captchator as Rack middleware, and helpers for sinatra.

Arithmetic Captcha

Arithmetic Captcha

Generates Text Catpchas, that are 'nice' by my own personal definition!

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.

A captcha verification approach for Rails apps, directly integrated into ActiveRecord’s validation mechanism and providing helpers for ActionController and ActionView.

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