Cardinal AI is a local, per-repo AI Kanban tool: columns are policies, cards become Claude-powered worker agents, and work ships as pull requests. Run `cardinal` inside any git repository to get a board for it at http://localhost:4000.

https://tabler.io ruby gem

Track legacy code usage, aggregate removal signals, and review everything in a mounted Rails engine dashboard.

A Rails Engine for collaborative plan review with AI-powered feedback.

A mountable Rails engine that provides a full-featured web interface for documenting database schemas — tables, columns, relationships, constraints, change tracking, ER diagrams, Excel export, and i18n support (EN/JA).

DBViewer is a mountable Rails engine that provides a simple interface to view database tables and their records.

Deadfire - lightweight css preprocessor

Provides components and controllers for building real-time video chat features in Rails applications using WebRTC, Action Cable, Turbo Streams, and Stimulus.

A Solid Queue dashboard for Active Job

font-awesome-propshaft provides the Font-Awesome web fonts and stylesheets as a Rails engine for use with the asset pipeline.

Registers .glsl/.vert/.frag assets with Propshaft, resolves #include directives at request/precompile time, and publishes a shader reflection manifest for consumption by views and JS at runtime.

Goodmin is an admin framework for Rails 8+. Use it to build dedicated admin sections for your apps, or stand alone admin apps such as internal tools.

Hephaestus is a Rails generator to create plugs for Yetto.

Tokens, reset, typography, grid primitives and components in the spirit of the International Typographic Style, as plain CSS plus a Rails engine that ships it. Monochrome by default: the value scale does the work and the one accent is the consuming application's to set.

Jigsaw Engine

An open source Rails 8+ engine built on `layered-ui-rails` that provides a multi-provider AI assistant with streaming responses and a full conversation UI.

A convention-over-configuration CRUD engine for Rails 8+, built on the layered-ui-rails gem. Declare a resource class, mount it in routes.rb, and get index, new/create, edit/update, and destroy actions with clean default views, Ransack-powered search and sorting, and Pagy pagination. Override any controller or view when you need full control - generators are included to help you create custom controllers and views.

An open source Rails 8+ engine built on Tailwind CSS, providing customisable WCAG 2.2 AA compliant design tokens, utility classes, and Stimulus controllers for theme switching, mobile navigation, slide-out panels, modals, and tabs. Integrates with the gems you already use (Devise, Pagy, Ransack).

Rails Engine providing private and public messaging for any object, such as Users or Groups

Mission Control dashboard for monitoring and managing SolidCache