Simple Audio Extension to Simple Captcha

Block repetetive requests from logged_in users and shows captcha.

My version of SimpleCaptcha

wxianfeng_simple_captcha is captcha for rails,modified from simple_captcha .

Ruby wrapper for Yandex.Cleanweb

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

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

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

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.

SimpleCaptcha is the simplest and a robust captcha. Its implementation requires adding up a single line in views and in controllers/models. SimpleCaptcha is available to be used with Rails2.0 or above and also it provides the backward compatibility with previous versions of Rails.

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

A Google-style captcha for enterprise Rails apps

A gem to generate captcha pictures.

Captcha Client for YunPian.com

Display and verify arcaptcha service captcha

A simple and custom captcha for Rails3.

Google reCaptcha helpers and verifier

AntiCaptcha api ruby wrapper

anti-captcha is a Ruby library for recognize captcha on anti-captcha.com

Arithmetic Captcha