With ActsAsTaggableHstore, you can tag a single model that uses postgres hstore type

Padrino version of the popular Rails tagging plugin. With ActsAsTaggableOnPadrino, you could tag a single model on several contexts, such as skills, interests, and awards. It also provides other advanced functionality.

A rails engine that lets you mount a job search engine

Allows for arbitrary permissions on arbitrary collections of objects, rather than system-wide role based management

* Simple data access for dynamic data sets through postgres with ruby

Adhocracy is group management engine for Rails.

Incomplete and in early stages.

Description of Adminka.

admin scaffold

Gem for adding advanced features into ActiveRecord

Adds idle connection management, statement pooling, and other advanced connection features

Database query builder for advanced search

Aenea

An ETL for retrieving records from the Affiliate Window APIand loading them into a Postgres database.

Ahnnotate comments on your ActiveRecord models with their respective schemas!

Edit langing pages in particular for Solidus ecommerce system

Ajax Validator is a Rails engine that allows to validate form fields.

PostgreSQL search for Alchemy CMS

A typed query builder for ruby, basically

Helpers for Stripe