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

Antigate (Decode captcha service) wrapper for Ruby

Drop in feedback engine with customizable fields, and captcha available

Russian Post tracking toolset, consisting tracking form bot (since Russian Post is too retarded for normal API) and captcha solver/recognizer.

A smart captcha library

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

dongsx

Simple negative captcha for Rails

Form protection with simple captcha calculations.

Generates and verifies ascii art captcha.

API to interact with BrandCAPTCHA http://www.pontamedia.com/en/brandcaptcha/

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

Simple captcha

This is mt first gem

create captcha for api based project

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

Description of RailsCaptcha.

Anti-spam protection for your website

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

Simple captcha image generator gem