Devise MailChimp adds a MailChimp option to devise that easily enables users to join your mailing list when they create an account.

Monitor all aspects of your applications health.

Audio/Video Transcoder for Paperclip using FFMPEG/Avconv

Pooled active support compliant caching with redis

Positionless model sorting for Rails.

Integrate modern JavaScript build system with Rails.

Ramaze is a simple and modular web framework

Sass API for JSON

Conjugates most common english verbs for all persons, tenses, standard aspects, and modern moods (with active diathesis). Standard and exceptional spelling rules are obeyed.

Omnibus helps you build self-installing, full-stack software builds. Sonian build.

Jubilee is a experimental webserver built for speed, it's based on Vertx.

The simplest way to group temporal data

Validations for Active Storage (presence)

Ruby/Graphviz provides an interface to layout and generate images of directed graphs in a variety of formats (PostScript, PNG, etc.) using GraphViz.

The elegant ElasticSearch client

Compile ES6 modules in the asset pipeline

Roles.

Include the knockout.js and some of its extensions so you can pick what you need. Adds the support for models and interation with the Rails backend.

Ibandit is a Ruby library for manipulating and validating IBANs. It allows you to construct an IBAN from national banking details; deconstruct an IBAN into national banking details; and validate an IBAN's check digits and format.

Helps you create generic WordPress themes and Thematic child themes

Finding time-consuming database queries for ActiveRecord-based Rails Apps

Poltergeist is a driver for Capybara that allows you to run your tests on a headless WebKit browser, provided by PhantomJS.

Jekyll plugin for building Jekyll sites with any GitHub-hosted theme

A ridiculously simple cross-language queuing system, built on top of MongoDB.

Fastlane plugin for Mobile Center

Raise now so you don't pay later

Bootswatches converted to SCSS ready to use in Rails asset pipeline.

Unified Logging Layer

compile your favourite Ruby source code for the browser!

Handful of common Irb features, made easy.

This rubygem does not have a description or summary.

retry intermittently failing rspec examples

A custom Rails FormBuilder that assumes the use of Twitter Bootstrap

The CSV library provides a complete interface to CSV files and data. It offers tools to enable you to read and write to and from Strings or IO objects, as needed.

Embulk is an open-source, plugin-based bulk data loader to scale and simplify data management across heterogeneous data stores. It can collect and ship any kinds of data in high throughput with transaction control.

Implements field type and partial for "tag_list"(*_list) virtual attribute.

Openwsman server implementation and client api with bindings

Symbolic math for ruby. This gem can help if you want to get a simplified form of a big equation or to speed up similar calculations or you need an abstraction layer for math. Symbolic does not have any external dependencies. It uses only pure ruby (less than 400 lines of code).

hubspot-ruby is a wrapper for the HubSpot REST API

Voight-Kampff detects bots, spiders, crawlers and replicants

Restrict the values assignable to ActiveRecord attributes or associations

The EmailAddress Gem to work with and validate email addresses.

ZMQMachine is another Ruby implementation of the reactor pattern but this time using 0mq sockets rather than POSIX sockets. Unlike the great Eventmachine ruby project and the Python Twisted project which work with POSIX sockets, ZMQMachine is inherently threaded. The 0mq sockets backing the reactor use a thread pool for performing their work so already it is different from most other reactors. Also, a single program may create multiple reactor instances which runs in its own thread. All activity within the reactor is single-threaded and asynchronous. It is possible to extend the 0mq library to "poll" normal file descriptors. This isn't on my roadmap but patches are accepted.

Enables Vagrant to spawn a Chef Zero instance that is shared by all VMs.

Ceedling is a build automation tool that helps you create and run C unit test suites. Ceedling provides two core functions: [1] It packages up several tools including the C unit test framework Unity, the Ruby-based mock generation tool CMock, and a C exception library CException. [2] It extends Rake with functionality specific to generating, building, and executing C test suites. Ceedling projects are created with a YAML configuration file. A variety of conventions within the tool simplify generating mocks from C files and assembling suites of unit test functions.

DCI (data, context and interaction) for Ruby / Rails / ActiveRecord

Fails your build if code quality thresholds are not met

A Ruby library for declaring, composing and executing GraphQL queries

This gem can be useful, if you need to upload files to your API from mobile devises.

Ruby wrapper for the Pinboard API

Simple authorization gem for graphql-ruby

Runt is a Ruby implementation of temporal patterns by Martin Fowler. Runt provides an API for working with recurring events using set expressions.

A light-weight infinite scrolling jQuery plugin, wrapped in a gem for Rails

You'll be in stitches at how easy it is to create a service at Stitch Fix

Web component framework for Rails providing widgets that trigger events and know when and how to update themselves with AJAX.

IsoLatte allows execution to be forked from the main process for safety

Enumerated attributes with I18n and ActiveRecord/Mongoid/MongoMapper support

Server provisioning utility for minimalists

Program execution tracker to retrieve data types information

SafeFinder lets you define model's null_object through simple DSL, and returns it when you can't find a result.

Spree extension for providing shipping methods that wrap the active_shipping plugin.

Adds a helper method for generating HTML tables from collections in Rails

Uglifier minifies JavaScript files by wrapping UglifyJS to be accessible in Ruby

Quickly get started with batman.js in a Rails app. Provides generators to get started and bundles in the latest version of batman.js.

You do not want to install it.

MiniMagick on Eventmachine

A simple API caching layer built on top of HTTParty and Redis

Enables you to use Paperclip with the Mongoid ODM for MongoDB.

Sqlite3 JDBC adapter for JRuby on Rails.

A tool for domain flyovers.

Test Kitchen is an integration tool for developing and testing infrastructure code and software on isolated target platforms.

Ruby client for the Stomp messaging protocol.

This gem can be used for wraping command-lines with `talks` command or for adding hooks in ruby code which would tell you something

Ruby Client for Instapaper's Full API

Presenting names of people in full, familiar, abbreviated, and initialized forms (but without titulation etc)

FasterCSV is intended as a complete replacement to the CSV standard library. It is significantly faster and smaller while still being pure Ruby code. It also strives for a better interface.

A Jekyll version of the "Forty" theme by HTML5 UP.

Jekyll plugin to automatically generate a tag cloud and tag pages.

A slice of functional programming to chain ruby services and blocks. Make them flow!

vagrant-serverspec is a Vagrant plugin that integrates serverspec into your workflow.

Ruby wrapper for pygmentize.

Code reviewer for web developing. Check your HTML/JS/CSS codes against bad codes.

Make your Rails app 10 times faster in development mode

Re-run failed RSpec tests.

SSL requirement adds a declarative way of specifying that certain actions should only be allowed to run under SSL, and if they're accessed without it, they should be redirected.

TicGit-ng is a simple ticketing system, roughly similar to the Lighthouse model, that is based in git.

Recursively traverse trees using a single SQL query

An async websocket library on top of websocket-driver.

OpenID Connect Server & Client Library

A gem that provides a Redis based web analytics solution for your rack-compliant apps. It gives you detailed analytics about visitors, unique visitors, browsers, OS, visitor recency, traffic sources and more

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

Light weight job scheduling on top of Resque. Adds methods enqueue_at/enqueue_in to schedule jobs in the future. Also supports queueing jobs on a fixed, cron-like schedule.

Enables Vagrant to manage DigitalOcean droplets

Generic connection pool for Ruby

Posting to the most popular social media

Fleximage is a Rails plugin that tries to make image uploading and rendering super easy.

JWT token generator extension for Doorkeeper

SecondBase provides support for Rails to manage dual databases by extending ActiveRecord tasks that create, migrate, and test your databases.

Helps to get ids or screen names from links to social network accounts