Selenium implements the W3C WebDriver protocol to automate popular browsers. It aims to mimic the behaviour of a real user as it interacts with the application's HTML. It's primarily intended for web application testing, but any web-based task can automated.

A simple HTTP and REST client for Ruby, inspired by the Sinatra microframework style of specifying actions: get, put, post, delete.

This gem add a few rake tasks to create a uber gems that will be shipped as a zip

Upload files in your Ruby applications, map them to a range of ORMs, store them on different backends.

Manipulate images with minimal use of memory via ImageMagick / GraphicsMagick

Ruby integrations for Elasticsearch (client, API, etc.)

Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.

Faraday adapter for Em::Http

Faraday adapter for EM::Synchrony

The Ruby cloud services library. Supports all major cloud providers including AWS, Rackspace, Linode, Blue Box, StormOnDemand, and many others. Full support for most AWS services including EC2, S3, CloudWatch, SimpleDB, ELB, and RDS.

The Ruby cloud services library. Supports all major cloud providers including AWS, Rackspace, Linode, Blue Box, StormOnDemand, and many others. Full support for most AWS services including EC2, S3, CloudWatch, SimpleDB, ELB, and RDS.

The Ruby cloud services library. Supports all major cloud providers including AWS, Rackspace, Linode, Blue Box, StormOnDemand, and many others. Full support for most AWS services including EC2, S3, CloudWatch, SimpleDB, ELB, and RDS.

HTTP Basic strategies for OmniAuth.

Enterprise strategies for OmniAuth.

OAuth strategies for OmniAuth.

OpenID strategies for OmniAuth.

Additional strategies for OmniAuth.

Ruby JSON Schema Validator

OAuth Core Ruby implementation

Wicked PDF uses the shell utility wkhtmltopdf to serve a PDF file to a user from HTML. In other words, rather than dealing with a PDF generation DSL of some sort, you simply write an HTML view as you would normally, and let Wicked take care of the hard stuff.