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Quick little arithmetic plain-text captcha
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This is a gem wrapper for tiny captcha in C with no dependencies.
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create captcha for api based project
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This is mt first gem
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IQ, Math Captcha
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dongsx
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Easy to use classical captcha for Rails apps
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This gem enable to use Captchme. Anti spam, Monetize captcha and Audience qualification
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Activity
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Simple negative captcha for Rails
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Generates and verifies ascii art captcha.
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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.
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SimpleCaptcha is available to be used with Rails 3 or above and also it provides the backward compatibility with previous versions of Rails.
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Simple negative captcha for Rails
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Metabypass | Ruby-based easy implementation for solving any type of captcha by Metabypass
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Merb plugin that provides resource access rate limits and captcha'ing
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This library can help you create a captcha in your terminal application, which may be damaged by a large influx of requests.
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Captcha based on encyrpting and decrypting user data by mathematical operation
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Implements view helpers for the ASIRRA CAPTCHA system for Rails-based websites
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