ActiveAdmin – A Ruby on Rails framework for creating elegant backends for website administration.
ActiveScaffold – ActiveScaffold provides quick and powerful user interfaces for CRUD (create, read, update, delete) operations for Rails applications. It’s excellent for generating admin interfaces, managing Data-Heavy Applications, creating Widgets or for quick prototyping. ActiveScaffold is completly customizable and offers a bunch of additional features including searching, pagination, layout control and overrides of fields, forms and templates.
Administrate – A Rails engine that helps you put together a super-flexible admin dashboard, by Thoughtbot.
bhf – A simple to use Rails-Engine-Gem that offers an admin interface for trusted user.
RailsAdmin – A Rails engine that provides an easy-to-use interface for managing your data.
Trestle – A modern, responsive admin framework for Rails. Build a back-end in minutes that will grow with the needs of your application.
Typus – Ruby on Rails control panel to allow trusted users edit structured content.