This gem allows you to create IOS Passbooks. Unlike some, this works with Rails but does not require it.

Prawn Handler for Rails. Handles and registers pdf formats.

The core methods of the Skylight profiler.

StackMaster is a sure-footed way of creating, updating and keeping track of Amazon (AWS) CloudFormation stacks.

Render versioned views automagically based on the clients requested version.

Captures a web page as a screenshot using Poltergeist, Capybara and PhantomJS

Easily run queries on shard and replica databases.

Make user messageable!;-)

Tests your rails API using its OpenAPI (Swagger) description of end-points, models, and query parameters.

Mitigates the BREACH and CRIME attacks on TLS in Rails applications

Protect your carrierwave from image bombs

A scope-based authorization solution for Ruby on Rails.

Model and repository framework

Extract, Transform, and Load (ETL) ruby wrapper

A Gem for Facebook Open Graph API

Simple wrapper for the Goodreads API

Adds indefinite article methods to String and Symbol

Rails provides an excellent XML Builder by default to build RSS and ATOM feeds, but nothing to help you build complex and custom JSON data structures. The standard to_json works well, but can get very verbose when you need full control of what is generated. JSON Builder hopes to solve that problem.

Report key app statistics to the Librato Metrics service and easily track your own custom metrics.

ruby-xen allows you to manage Xen virtual servers via Ruby. It currently wraps the command line tools provided by Xen (xm) as well as Steve Kemps excellent Xen-tools (http://www.xen-tools.org/software/xen-tools/).