Simple captcha

Description of TinyCaptcha.

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

A gem to generate captcha pictures.

dongsx

This gem enable to use Captchme. Anti spam, Monetize captcha and Audience qualification

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.

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.

A honeypot style captcha extension for ActiveRecord. Simple one-line inclusion in the model combined with a simple form field should trap the bad guys in the molasses.

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

This gem enable to use Captchme. Anti spam, Monetize captcha and Audience qualification

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

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

Simple negative captcha for Rails

Display and verify arcaptcha service captcha

Antispam helps prevent spam in your Rails applications by checking against DNS blacklists and spam-prevention databases. It has two core features: (1) IP-based spam detection using Project Honey Pot to block known spammers automatically, and (2) content-based spam detection using Defendium’s mach...

Block repetetive requests from logged_in users and shows captcha.

My version of SimpleCaptcha

Ruby wrapper for Yandex.Cleanweb