| 1 | 7 | 2 | activesupport | A toolkit of support libraries and Ruby core extensions extracted from the Rails framew... | 
        | 2 | 9 | 17 | rack | Rack provides a minimal, modular and adaptable interface for developing
web application... | 
        | 3 | 31 | 59 | builder | Builder provides a number of builder objects that make creating structured data
simple ... | 
        | 4 | 34 | 42 | activemodel | A toolkit for building modeling frameworks like Active Record. Rich support for attribu... | 
        | 5 | 36 | 55 | activerecord | Databases on Rails. Build a persistent domain model by mapping database tables to Ruby ... | 
        | 6 | 37 | 58 | actionpack | Web apps on Rails. Simple, battle-tested conventions for building and testing MVC web a... | 
        | 7 | 43 | 61 | rails | Ruby on Rails is a full-stack web framework optimized for programmer happiness and sust... | 
        | 8 | 45 | 56 | railties | Rails internals: application bootup, plugins, generators, and rake tasks. | 
        | 9 | 47 | 62 | actionmailer | Email on Rails. Compose, deliver, and test emails using the familiar controller/view pa... | 
        | 10 | 49 | 57 | actionview | Simple, battle-tested conventions and helpers for building web pages. | 
        | 11 | 58 | 88 | rails-html-sanitizer | HTML sanitization for Rails applications | 
        | 12 | 59 | 66 | activejob | Declare job classes that can be run by a variety of queuing backends. | 
        | 13 | 62 | 83 | rails-dom-testing | This gem can compare doms and assert certain elements exists in doms using Nokogiri. | 
        | 14 | 71 | 125 | sprockets | Sprockets is a Rack-based asset packaging system that concatenates and serves JavaScrip... | 
        | 15 | 72 | 81 | globalid | URIs for your models makes it easy to pass references around. | 
        | 16 | 82 | 138 | sprockets-rails | Sprockets Rails integration | 
        | 17 | 85 | 70 | actioncable | Structure many real-time application concerns into channels over a single WebSocket con... | 
        | 18 | 94 | 71 | activestorage | Attach cloud and local files in Rails applications. | 
        | 19 | 108 | 95 | marcel | Simple mime type detection using magic numbers, filenames, and extensions | 
        | 20 | 112 | 257 | execjs | ExecJS lets you run JavaScript code from Ruby. | 
        | 21 | 122 | 93 | actiontext | Edit and display rich text in Rails applications. | 
        | 22 | 124 | 94 | actionmailbox | Receive and process incoming emails in Rails applications. | 
        | 23 | 131 | 451 | arel | Arel Really Exasperates Logicians
Arel is a SQL AST manager for Ruby. It
1. Simplifie... | 
        | 24 | 143 | 155 | bootsnap | Boot large ruby/rails apps faster | 
        | 25 | 159 | 323 | jquery-rails | This gem provides jQuery and the jQuery-ujs driver for your Rails 4+ application. | 
        | 26 | 163 | 398 | sass-rails | Sass adapter for the Rails asset pipeline. | 
        | 27 | 165 | 198 | jbuilder | Create JSON structures via a Builder-style DSL | 
        | 28 | 192 | 450 | coffee-script | Ruby CoffeeScript is a bridge to the JS CoffeeScript compiler. | 
        | 29 | 201 | 322 | spring | Preloads your application so things like console, rake and tests run faster | 
        | 30 | 205 | 523 | coffee-rails | CoffeeScript adapter for the Rails asset pipeline. | 
        | 31 | 264 | 341 | rails-controller-testing | Extracting `assigns` and `assert_template` from ActionDispatch. | 
        | 32 | 298 | 280 | web-console | A debugging tool for your Ruby on Rails applications. | 
        | 33 | 323 | 903 | turbolinks | Rails engine for Turbolinks 5 support | 
        | 34 | 455 | 2,057 | rails-deprecated_sanitizer | Deprecated sanitizer API extracted from Action View. | 
        | 35 | 504 | 1,277 | webpacker | Use webpack to manage app-like JavaScript modules in Rails | 
        | 36 | 555 | 1,184 | activeresource | REST on Rails. Wrap your RESTful web app with Ruby classes and work with them like Acti... | 
        | 37 | 623 | 513 | activemodel-serializers-xml | XML serialization for your Active Model objects and Active Record models - extracted fr... | 
        | 38 | 749 | 100 | prism | Prism Ruby parser | 
        | 39 | 1,002 | 1,301 | activerecord-session_store | An Action Dispatch session store backed by an Active Record class. | 
        | 40 | 1,147 | 1,372 | rails-observers | Rails observer (removed from core in Rails 4.0) | 
        | 41 | 1,674 | 1,693 | actionpack-action_caching | Action caching for Action Pack (removed from core in Rails 4.0) | 
        | 42 | 1,947 | 2,677 | activerecord-deprecated_finders | Deprecated finder APIs extracted from Active Record. | 
        | 43 | 1,956 | 2,055 | actionpack-xml_parser | XML parameters parser for Action Pack (removed from core in Rails 4.0) | 
        | 44 | 2,005 | 2,518 | actionpack-page_caching | Static page caching for Action Pack (removed from core in Rails 4.0) | 
        | 45 | 2,012 | 5,006 | protected_attributes | Protect attributes from mass assignment | 
        | 46 | 2,186 | 572 | solid_queue | Database-backed Active Job backend. | 
        | 47 | 2,319 | 673 | solid_cache | A database backed ActiveSupport::Cache::Store | 
        | 48 | 2,574 | 2,407 | record_tag_helper | ActionView Record Tag Helpers | 
        | 49 | 4,063 | 12,993 | activesupport-json_encoder | A pure-Ruby ActiveSupport JSON encoder | 
        | 50 | 4,195 | 4,425 | rails-perftest | Rails performance tests (removed from core in Rails 4.0) | 
        | 51 | 4,334 | 2,625 | kredis | Higher-level data structures built on Redis. | 
        | 52 | 5,148 | 13,700 | prototype-rails | Prototype, Scriptaculous, and RJS for Ruby on Rails | 
        | 53 | 5,341 | 5,957 | rails-ujs | This gem provides rails-ujs driver for Rails applications. |