A macro-style method that will automatically read the database contraints (null requirements, string length, etc) and enforce those at the model level to keep validation more DRY. Provides many options to customize how automatic it is and what columns it affects.

Keep your tests DRY. This makes some methods available to avoid repeating yourself during testing

A gem that provides controller and view methods to make displaying of window/page titles DRYer.

Define WinAutomation procedures that can be included elsewhere without consistency issues.

ActionTree is a DRY request router. It provides a compact DSL for defining actions and mapping requests to invoke them.

Easily define images only once and show them in your views in a DRY manner.

Edifice makes your Rails life easier. It's designed to simplify CSS & JS integration in your Rails app by following the principle of DRY, less obtrusive markup. Stop writing unnecessary javascript boilerplate, stop wasting time namespacing view CSS and start enjoying rails again..

Garterbelt is a Ruby HTML/XML markup framework inspired by Erector and Markaby. Garterbelt maps html tags to methods allowing the intuitive construction of HTML pages using nothing but Ruby. And because it is all Ruby all the time, views benefit from the dryness of inheritance, modules and all the meta magic that Ruby can imagine. Stockings not included.

An extension to hash to allow various transformations using simple DSL. Also has optional rails extension to dry up frequently applied transformations on controller params.

A simple DRY template engine for Rails.

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.

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 files (e.g. a :belongs_to and a :has_many).

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.)