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.

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

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.

This is mt first gem

Helps humankind with simpler captchas

MVC based Math, Logic Captcha

RedisCaptcha provides simple captcha that can be read by human.

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Unobtrusive, flexible and complete spam protection for Rails applications using honeypot strategy for better user experience.

Simple gem to add captcha or negative captcha to your Rails 3 application