To help with keep the bots at bay this gem helps you easily add honeypots to forms and/or obfuscate your form field names

Generates and verifies ascii art captcha.

Simple negative captcha for Rails

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

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

Simple captcha

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.

This is mt first gem

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

Description of RailsCaptcha.

jQuery slide captcha system with jQuery & jQuery UI for Rails 3

Captcha generator for rails

Simple negative captcha for Rails

A captcha that uses images instead of garbled text

This plugin adds helpers for the YinXiangMa CAPTCHA API

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.

Helps humankind with simpler captchas

Form protection with simple captcha calculations.