madmin by excid3

Admin framework for Rails 5+. Maintained by varvet on GitHub, where it has earned 479 stars from the community.

The Essential Toolkit for building Internal Tools and admin panels with Ruby on Rails. Maintained by avo-hq on GitHub, where it has earned 1,796 stars from the community.

Sail is a lightweight Rails engine that brings an admin panel for managing configuration settings on a live Rails app. Maintained by vinistock on GitHub, where it has earned 505 stars from the community.