Using Inherited Resources is an excellent way to reduce the amount of repetition in your controllers. But what about views? A lot of times resources share the same views, so why not DRY 'em up using Inherited Resources Views!

Methods to get and build models directly from parameters. Useful for DRYing up code, specifically very dynamic code for things like admin tools.

kiki is a dead-simple module that you can include in your Models that provides convenient, DRY way of generating unique keys for your favorite K/V or NoSQL databases.

Dryml FireMarker annotates the output of Hobo and Rails apps that use the DRYML templating system.

Keep a DRY history of your ActiveRecord models' changes

ActiveService is a Rails extension that aims at creating reusable, transactional services in your application to make your code more DRY.

SchemaAssociations extends ActiveRecord to automatically create associations by inspecting the database schema. This is more more DRY than the standard behavior, for which in addition to specifying the foreign key in the migration, you must also specify complementary associations in two model fi...

SchemaValidations extends ActiveRecord to automatically create validations by inspecting the database schema. This makes your models more DRY as you no longer need to duplicate NOT NULL, unique, numeric and varchar constraints on the model level.

Dynamic_menu is a gem aimed at making menus more DRY with inheritance

use formic to generate markup from sematic syntax. formic DRY your template and make it readable. It also seperate the sematic of the content from the actual markup, make it possible to render multiple view for the same content

A simple plugin to DRY models

Uses guard monitoring to run rake file tasks to keep you DRY. \ (A placeholder for the moment.)

Keep a DRY history of your ActiveRecord models' changes

DRY controller actions for Rails > 3.0 and keeps your controllers nice and skinny.

A DRYML inspired markup language written in C for Ruby

DRY your RubyMotion project

Enables easy and DRY code timing capabilities.

Combining the method object pattern with DRY initialization

YAML based DRY settings manager.

Provides extensions to ActionView::Helpers::CaptureHelper: content_for_with_default, no_content_for, and an enhanced content_for that plays nice with friends