Simple negative captcha for Rails

A smart captcha library

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

dongsx

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

Drop in feedback engine with customizable fields, and captcha available

Antigate (Decode captcha service) wrapper for Ruby

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

AntiCaptcha api ruby wrapper

This is a gem wrapper for tiny captcha in C with no dependencies.

Define questions and answers in a YAML file and validate your models with a single line of code. No more captchas or other stupid tricks.

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.

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

IQ, Math Captcha

A simple and fast image captcha generator that uses opencv and memcached.

Simple captcha

create captcha for api based project

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