SimpleCaptcha is the simplest and a robust captcha. Its implementation requires adding up a single line in views and in controllers/models. SimpleCaptcha is available to be used with Rails2.0 or above and also it provides the backward compatibility with previous versions of Rails.

Captcha library which uses imagemagick to create captchas

A really simple currency converter using XavierMedia API. It's Ruby 1.8, 1.9 and JRuby compatible, and it also takes advantage of Rails cache when available.

jQuery autocomplete for SimpleForm form fields

The following custom Simple Form inputs are available : boolean, collection_check_boxes, collection_radio_buttons, color, date_time, file, image, numeric, redactor, selectize and slider

An extremely easy way to protect your site by requiring Google logins without having to set up a traditional authentication system

SimplePostmark makes it easy to send mails via Postmark™ using Rails 3's ActionMailer.

SimplestStatus provides a dead-simple DSL for defining statuses on Rails models, which generates scopes, constants, and a number of instance-level convenience methods.

Create and display Tooltip Help in view pages in Rails applications. Uses jQuery to display tooltips, with html fallback if JavaScript is not available. Makes use of help text in the user's locale if available.

Expands Ruby on Rails to allow simple breadcrumb detour workflows.

Adds singleton functionallity to ActiveRecord models

Provides the necessary functionality to work with Magnolia-managed content in a Rails application.

Include gmail like auto-save on your forms

Site24x7 APMInsight gives you end-to-end web-transaction awareness of Rails applications enabling you to isolate performance issues and resolve them quickly. To monitor Rails application performance, download and deploy Ruby agent(site24x7_apminsight) in your Application Server. This agent allows you to send information about Ruby applications. You can install APM Insight Agent via Rubygems or download it from your user account in Site24x7

Provides helpers for easy adding of html meta information to Rails applications. * Easily add default description and keywords meta tags. * Customize meta tags on per-view basis * Add head title tag with breadcrubms * Add page title

Slack500 is a gem that notifies exceptions raised by Rails to your Slack channel using incomming WebHooks URL.

Sign in (or up) with Slack for Rails applications

Want to send the emails generated by your Ruby on Rails application to a Slack channel? Now you can!

A modern and overridable admin gem, just the rails way.

Connection proxy for ActiveRecord for master / replica setups.