Autohides sensitive attributes (such as passwords) when rendering XML or JSON from ActiveRecord model

Cross model hierarchical (parent, child, sibling) relationship between ActiveRecord models.

hierarchy-tree is a gem that shows the whole hierarchy and the associations related to a desired class.

FSM with support for nested states and parameterised events

Hikari allows sorting in Rails projects based on fields or scopes. Sorting can be done across models via scopes.

Hipaapotamus is an amazing gem for amazing people

Hippo is a framework for writing single page web applications. It's a full stack framework that contains both server and client.

Currently offers soft deletion, and a default scope that excludes 'deleted' records

Rails compatible gem that provides full DB connection and models to HiveSQL.io

Stamp out copies of a model object, even after the original has departed, with these lightweight ActiveRecord concerns

Raises an exception if an ActiveRecord callback is used. Won't interfere with usage from within other gems.

Single-Sign-On for the front and rails backend of a Single-Page-App

Catch bad guys when they stick their hands in the honey.

Rails I18n: de-facto standard library for ActiveRecord 3 model/data translation.

A ruby gem providing social networking features for rails app.

This library allows to map accessors and properties of deeply nested object graph to a plain mapper object with flexible behavior

Fixtures replacement with scenarios

A gem that allows you to add date only, time only and datetime pickers to your forms. This gem also takes into account the way Ruby doesn't parse certain American-friendly dates so it passes along hidden fields with the values expected by rails. When updating the values they are 'localized' using the locale file to get them into the format expected by the picker.

Rails gem for obscuring database fields. Uses OpenSSL.

Allows embedding documents in ActiveRecord models using PostgreSQL HStore