Turkee will help you to easily create usability studies, post HITs, and retrieve the user entered values from Mechanical Turk.

Add a validation filter to your controller.

UI interface for rails-settings-cached in active admin

Wrapper over Rails Event Store with conventions and transparent Rails integration

Simple tagging gem for Rails using postgres array.

With Amountable, you can easily attach, organize and sum Ruby money fields to your models without migrating.

api-versions helps manage your Rails app API endpoints.

CMS built on rails with love.

Allows caching of pages with flash messages by rendering flash messages from a cookie using JavaScript, instead of statically in your Rails view template. Flash contents are converted to JSON and placed in a cookie by an after_filter (default) or a Rack Middleware (option).

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The spicy feature toggle framework

Preload factories (Factory Bot) just like fixtures. It will be easier and, probably, faster!

Fie is a Rails-centric frontend framework running over a permanent WebSocket connection.

This library provides view components for the GOV.UK Design System. It makes creating services more familiar for Ruby on Rails developers.

Adds validation methods to ActiveModel for validating dates and times. Works with multiple ORMS.

The official PagSeguro library

Adds the validates_uniqueness_without_deleted validator to ignore deleted fields when validating for uniqueness.

Playbook UI is built out in Ruby View Components and React Components. Playbook takes a modern design approach and applies it in a way that makes it easy to support bleeding edge or legacy systems.

Simple PDF generation using the prawn library.

PunchingBag is a hit counting and simple trending engine for Ruby on Rails