Helps humankind with simpler captchas

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

you will get arithmatic sum with answer you just have to compare with ur user in controller

Captcha based on encyrpting and decrypting user data by mathematical operation

Death by Captcha Ruby implementation (HTTP API)

RedisCaptcha provides simple captcha that can be read by human.

Implementation of captcha (Completely Automated Public Turing-Test to Tell Computers and Humans Apart) that is both easy to use and easy to customize/extend.

Description of TinyCaptcha.

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

dongsx

A simple image captcha gem

This is mt first gem

Quick little arithmetic plain-text captcha

Simple lib to generate a math_captcha to prevent spammers in form. Supports localization.

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

Solve Media CAPTCHA Replacement

This plugin adds helpers for the YinXiangMa CAPTCHA API

Form protection with simple captcha calculations.

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

Gem that uses RuCaptcha API to solver any type of captcha