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Rails mountable engine, that provides captcha support
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Captcha form Jike API
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Generates and verifies ascii art captcha.
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API to interact with BrandCAPTCHA
http://www.pontamedia.com/en/brandcaptcha/
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generate captcha by dalli,use the memcache
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Simple captcha based on plain text questions.
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Captcha generator for rails
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It's a Rails Captcha Engine for Rails 3 applications.
2019
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Simple reverse captcha solution that consist in create a hidden field that should be always empty.
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Captchator as Rack middleware, and helpers for sinatra.
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Block repetetive requests from logged_in users and shows captcha.
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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.
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This is a Captcha gem for Rails Applications. It drawing captcha image with C code so it no dependencies.
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SoaringSimpleCaptcha 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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Implements view helpers for the ASIRRA CAPTCHA system for Rails-based websites
2019
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A gem to generate captcha pictures.
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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.
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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.
2019
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Metabypass | Ruby-based easy implementation for solving any type of captcha by Metabypass
2019
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Captcha Gem for Rails, which generates captcha image by Rust.
2019
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