Downlow provides an easy way to fetch files or archives and extract them with minimal hassle.

Downspout is an easy-to-use ruby library for downloading files from URLs, supporting both HTTP & FTP protocols. HTTP downloads can use either Net::HTTP, or libcurl (via the Curb gem)

Ruby helper library for Firefox Extension DownThemAll.

Helpful log for beginners

Run tests on change in a docker container continuously

Form builder additions for drier and localized forms, and association fields adding and removing with jQuery sweetness inspired by Ryan Bates' Railcast #197

print a random dtc quote in your terminal

Generators such as Uploadify Albums and Photos, and Location or facilities

Library and command line tool to apply Dreamweaver templates to HTML files.

A gem to allow dynamic error pages in Rails

Dynamic fieldsets for rails controllers

Let's your views define attachment styles, and delays processing all the way to the first user who requests it.

A dynamic query gui for ActiveRecord

Dynashard allows you to shard your ActiveRecord models. Models can be configured to shard based on context that can be defined dynamically.

More or less complete set of tools for managing your Dynect zones, records and nodes via REST API.

Submit request operations for dyno calculations on Heroku

ActiveRecord::Batches#find_in_batches has some gotchas. This library provides alternate algorithms that may better suit you, in certain circumstances. Specifically: you can order your results other than by primary key, and you can limit your batches to just a certain range of results not only all records.

http://developer.ean.com/docs/read/hotels/Version_3

Start your client side out right

Gem adds class methods to create readable, writable and accessible constants.