Track what product being viewed, what being purchased. Who are consistant buyers etc.

Add support to complex resources of PostgreSQL, like data types, array associations, and auxiliary statements (CTE)

Allows to define form inputs and filters by relation for ActiveAdmin resource pages using Ransacker to dynamicaly load items while user is typing symbols in filter

Jcrop plugin for ActiveAdmin, enable image cropping solution on image fields

Add drag and drop reordering to ActiveAdmin tables.

Making object from any hash or hash array

Rails engine to generate instant reports from adhoc SQL query.

Automaticaly increments an ActiveRecord column

autoNumeric.js library automatically formats currency and numbers. With an ujs flavor it is now directly usable in a rails project. All credits for autoNumeric.js library its-self go to its creator BobKnothe

Double entry bookkeeping with Rails

The new de-facto for API testing your Rails application

A user-centric voting extension for Rails 3 applications.

Explicit soft deletion for ActiveRecord via deleted_at and default scope.

Track keywords search, checkout events, add to cart, remove from cart and other events.

A Rails gem to supply a front-end and reporting capability to the Surveyor gem.

Manage delta indexes via Delayed Job for Thinking Sphinx

Allow staff users to pretend to be your customers; to impersonate their account.

Enable to use the concept of form objects with ActiveModel

Simple gem that allows you to run multiple ActiveRecord::Relation using hash. Perfect for APIs.

ActiveRecord Association Helper for PORO (Plain Old Ruby Object)