abyme is the modern way to handle dynamic nested forms in Rails 6+.

Make administrative views creation less repetitive

Rails adserver tool for selecting a smaller subset of banners from all possible banners with differing banner placement combinations. Gem includes admin tools for handling banners in live environment. Includes basic targeting, viewcount, frequency etc setups.

A modular CMS for Ruby on Rails 5 with an intuitive out-of-the-box interface to manage and customize components. Use Binda if you want to speed up your setup process and concentrate directly on what your application is about. Please read the documentation for more information and a quick start guide.

Bulkrax is a batteries included importer for Samvera applications. It currently includes support for OAI-PMH (DC and Qualified DC) and CSV out of the box. It is also designed to be extensible, allowing you to easily add new importers in to your application or to include them with other gems. Bulkrax provides a full admin interface including creating, editing, scheduling and reviewing imports.

Carnival is an easy-to-use and extensible Rails Engine to speed the development of data management interfaces. When you use Carnival you can benefit from made features that are already done. If you need to change anything, you can write your own version of the method, using real Ruby code without worrying about the syntax of the engine.

A data curation Ruby on Rails engine built on Hydra and Sufia

A basic metadata editor for hydra-head

Best rails admin panel. Great mechanism for customization and rapid development

Rails engine supporting multiple auth providers per user.

Simple and real-life tested Rails::Engine admin interface

Adds an input with autocomplete/typeahead compatible with Bootstrap 3.

Brightcontent core

Easily add Judge client side validation to your SimpleForm forms.

Kuhsaft is a Rails engine that offers a simple CMS.

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Rails admin engine

The peoplefinder provides searchable staff profiles for your organisation. Since it's a rails engine, you can re-skin it for your organisation.

Adds an image preview to your forms

Makes it easy to use SimpleForm::FormBuilder with Ransack without constantly having to supply labels and other pains.