Web apps on Rails. Simple, battle-tested conventions for building and testing MVC web applications. Works with any Rack-compatible server.

Edit and display rich text in Rails applications.

mime-types-data provides a registry for information about MIME media type definitions. It can be used with the Ruby mime-types library or other software to determine defined filename extensions for MIME types, or to use filename extensions to look up the likely MIME type definitions.

Sprockets is a Rack-based asset packaging system that concatenates and serves JavaScript, CoffeeScript, CSS, Sass, and SCSS.

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah also includes some HTML sanitizers based on `html5lib`'s safelist, which are a specific application of the general transformation functionality.

HTML sanitization for Rails applications

Capybara is an integration testing tool for rack based web applications. It simulates how a user would interact with a website

This gem can compare doms and assert certain elements exists in doms using Nokogiri.

Ruby Sass is deprecated! See https://sass-lang.com/ruby-sass for details. Sass makes CSS fun again. Sass is an extension of CSS, adding nested rules, variables, mixins, selector inheritance, and more. It's translated to well-formatted, standard CSS using the command...

Easy upload management for ActiveRecord

This gem is used by GitHub to render any fancy markup such as Markdown, Textile, Org-Mode, etc. Fork it and add your own!

Great Ruby debugging companion: pretty print Ruby objects to visualize their structure. Supports custom object formatting via plugins

Simple mime type detection using magic numbers, filenames, and extensions

XPath is a Ruby DSL for generating XPath expressions

Active Merchant is a simple payment abstraction library used in and sponsored by Shopify. It is written by Tobias Luetke, Cody Fauser, and contributors. The aim of the project is to feel natural to Ruby users and to abstract as many parts as possible away from the user to offer a consistent inter...

Capybara aims to simplify the process of integration testing Rack applications, such as Rails, Sinatra or Merb. It is inspired by and aims to replace Webrat as a DSL for interacting with a webapplication. It is agnostic about the driver running your tests and currently comes bundled with rack-tes...

Capybara aims to simplify the process of integration testing Rack applications, such as Rails, Sinatra or Merb. It is inspired by and aims to replace Webrat as a DSL for interacting with a webapplication. It is agnostic about the driver running your tests and currently comes bundled with rack-tes...

Behaviour Driven Development with elegance and joy

RSpec results that your continuous integration service can read.

Fast mime detection by extension or content (Uses freedesktop.org.xml shared-mime-info database)