Anti-spam protection for your website

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

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

Wrapper for Captchabot.com

Simple negative captcha for Rails

Simple negative captcha for Rails

Submit captcha images and retrieve the text as a string.

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

Captcha-Plugin for Rails

Captcha based on encyrpting and decrypting user data by mathematical operation

Implements view helpers for the ASIRRA CAPTCHA system for Rails-based websites

Captcha Client for YunPian.com

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

Metabypass | Ruby-based easy implementation for solving any type of captcha by Metabypass

Rack middleware Captcha verification using Recaptcha API.

Ruby port of VIT AutoCaptcha

Display and verify arcaptcha service captcha

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

Arithmetic Captcha

RedisCaptcha provides simple captcha that can be read by human.