DCA

helpers for rails to implement DCI pattern (http://andrzejonsoftware.blogspot.com/2011/02/dci-and-rails.html)

A D&D character generator for the lazy. It will give you a name, age, class and race. It will not roll up your stats (yet).

Apply grammatical cases to words.

ActiveModel validation against duplicating records.

Debugging and tracing utilities for Ruby

Add ActiveSupport::Inflector#dehumanize to invert humanize

A Declarative HTML embedded DSL for HTML/XML Templating in Ruby, This gem was intended to be use as teaching material for universitary students.

Azure Queue backend for delayed_job

Web interface for delayed_job inspired by resque

A thread safe, Redis backed queue with the ability to delay items from being dequeued

ActiveRecord serializer DSL for mapping model attributes and associations. Similar to ActiveModel Serializers with many enhancements including bi-directional support, i.e. deserialization.

Delphix Engine REST API

Deltoid diffs HTML documents using a relatively simple N-way algorithm. It reports deltas as an array of hashes, where each hash contains :content, :xpath, and :index keys.

Content Management System for Rails 3 Created by Paul @ Deluxe Digital Media

Ruby wrapper for the Demandbase API

Library to allow you to easily fake data during demos

Ruby implementation of Clauset's Hierarchical Random Graphs

Denormalize ActiveRecord fields for performance reasons

Cache method outputs and automatically create chainable scopes based on their outputs