Create virtual ruby/rubygems environments.

A gem for getting info about products on a website that has a similar name

Extracts statistics from html documents

Rucola is an extension for RubyCocoa. It has a application skeleton generator and builds an "opinionated" application layout, like the one known from rails. And comes with RubyCocoa specific rake tasks.

Recursively traverses data structures (Hash & Array currently)

Gadu Gadu protocol client implementation in Ruby language

Roku™ set-top box remote control, command line and web interfaces

Allows you to define a set of 'rules' or dynamic methods to apply to a class.

Ruler module implements a DSL that makes it easy to write a set of facts and rules. If you have some tricky conditional logic, Ruler can help clear it up.

Rack middleware for connecting Rack applications to rules.io, with extensions for Rails 3 applications.

A simple UML Grapher for Rails objects

DEPRECATED - Mediator for apps that want their content to be in the search index

Rumor

runcoderun command line gem

Is the local client to the puppet_controller

A library for Ruote processes, based on FS storage and sub-processes

Rupert allows to manipulate RPM files independently from availability of rpmlib.

Vagrant is a tool for building and distributing virtualized development environments.

Easy upload management for ActiveRecord

Even delivering email to the local machine may take too long when you have to send hundreds of messages. ar_mailer allows you to store messages into the database for later delivery by a separate process, ar_sendmail.