Run minitest suites after your Chef recipes to check the status of your system.

TabsOnRails is a simple Ruby on Rails plugin for creating tabs and navigation menu for a Rails project.

A rich text editor for everyday writing

Adds zipcode validation methods to ActiveModel considering different country zipcode formats.

Bootstrap is Twitter's toolkit for kickstarting CSS for websites, apps, and more. It includes base CSS styles for typography, forms, buttons, tables, grids, navigation, alerts, and more.

Write Rails controllers with one class per action

Adds typed hstore backed fields to an ActiveRecord model.

An easy extension for Paperclip to crop your image uploads using jCrop

Out of the box, Rails will render templates in a controller context only. This gem allows for calling "render" from anywhere: models, background jobs, rake tasks, you name it.

Asset path helpers for Sprockets 2.x & 3.x applications

Render versioned views automagically based on the clients requested version.

Use searchable selects based on Select2 in Active Admin forms and filters.

Plugin for nested has_many forms in Administrate

Execute your ActiveRecord migrations with Percona's pt-online-schema-change. Formerly known as Percona Migrator.

A Faraday middleware for logging request and response activity including method, URI, headers, and body at varying log levels.

Migrate large tables without downtime by copying to a temporary table in chunks. The old table is not dropped. Instead, it is moved to timestamp_table_name for verification.

Generated scopes for ActiveRecord classes.

URI normalization, c14n, escaping, and extraction

A Rails interface for Intuit's Quickbooks Web Connector that's OPEN SOURCE!

Email Condom for your Ruby Server. In Rails, Sinatra, et al, or simply the mail gem: Aids in development, testing, qa, and production troubleshooting of email issues without worrying that emails will get sent to actual live addresses.