Custom Ruby on Rails form builder that generates GOV.UK elements styled markup for form inputs, including error validation messages.

This gem provides access to devise helpers inside of Grape applications.

Provides a Formatter for the Grape API DSL to emit objects serialized with jsonapi-resources.

A gem that helps you autogenerate a GraphQL API from Mongoid or ActiveRecord models.

This gem purpose is to make graphql easier to use in ruby. Mainly developed for from-scratch app

Guard for compiling sprockets assets

Render 400 error whenever a request's %-encoding is malformed

Hanmoto provides a simple way to manage public pages with Asset Pipeline.

HasAccounts is a full featured Rails gem providing models for financial accounting.

An Active Model validator that uses the face.com API to ensures an image contains a face

Allow addition of custom 'magic' columns to ActiveRecord models.

Moderated fields or whole model instances are serialized and saved into a separate moderations table. The moderation can then be accepted and the changes will be applied to the model. This way, lookups for existing, accepted fields or entries will be much faster than if using something like Papertrail, since the changes that have not yet been accepted are stored outside of the model table - in the moderations table.

Headhunter is an HTML and CSS validation tool that injects itself into your Rails feature tests and automagically checks all your generated HTML and CSS for validity. In addition, it also looks out for unused (and therefore superfluous) CSS selectors.

This gem adds a helper and generator to facilitate the use of Head JS in your Rails 3 projects the same way you would normally add javascript tags using Rails default helpers.

Ruby library for image galleries generation.

heroku_external_db lets you specify multiple databases using Heroku-style DATABASE_URL parameters, wire them up to different ActiveRecord configurations, and automatically configure it from the Rails environment. It also adds support for the :sslca configuration parameter so you can talk to external MySQL servers over SSL.

Quickly and easily add SSL to a Rails App with Let's Encrypt

New Relic (on Heroku) currently reports queue times as queuing at the router level. The goal of this gem is to provide new relic with the proper queueing time for requests, which takes into account queue time at the dyno level.

Adds ActiveRecord support for hierarchical data structures using PostgreSQL's LTREE column type.

Press/Blog/News plugin for Homeland, this gem is only work on Homeland Application.