Submit captcha images and retrieve the text as a string.

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.

A Rails captcha gem that attempts to determine whether or not a user is human.

Wrapper for Captchabot.com

Captchator as Rack middleware, and helpers for sinatra.

Unity Captcha is a gem that use two levels of Captcha. First level is about Left Hemisphere: Logic and Math. Second level is about Right Hemisphere: Intuition and Drawing. This two levels functioning in complete harmony creates unity and this is the base design of this Captcha.

这是一个验证码生成器。基于rucaptcha。本人只是将他的源码拉下来。为我的网站进行适配。因为我不使用sesion.id

Simple Audio Extension to Simple Captcha

My version of SimpleCaptcha

Repackaged visualCaptcha's backend service, including translation and minor modification. Mainly for private use. Everything still belongs to original author: emotionLoop. ...

Ruby port of VIT AutoCaptcha

Ruby wrapper for Yandex.Cleanweb

RedisCaptcha provides simple captcha that can be read by human.

Rails mountable engine, that provides captcha support

Description of TinyCaptcha.

Captcha form Jike API

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

A simple image captcha gem

generate captcha by dalli,use the memcache

This is mt first gem