factory_bot provides a framework and DSL for defining and using factories - less error-prone, more explicit, and all-around easier to work with than fixtures.

gives something like the functionality of libwww-perl (LWP) in Ruby

WebMock allows stubbing HTTP requests and setting expectations on HTTP requests.

A plain-Ruby implementation of GraphQL.

factory_bot_rails provides integration between factory_bot and Rails 6.1 or newer

Common utility and base classes for legacy Google REST clients

New Relic is a performance management system, developed by New Relic, Inc (http://www.newrelic.com). New Relic provides you with deep information about the performance of your web application as it runs in production. The New Relic Ruby agent is dual-purposed as a either a Gem or plugin, hosted ...

A framework for building reusable, testable & encapsulated view components in Ruby on Rails.

Common interface for Ruby's HTTP libraries

An unobtrusive ruby authentication library based on ActiveRecord.

This gem is used by GitLab to render any non Markdown markup

Go faster, off the Rails

Rack::Cache is suitable as a quick drop-in component to enable HTTP caching for Rack-based applications that produce freshness (expires, cache-control) and/or validation (last-modified, etag) information.

Fast date/time parser with customisable formats, timezone and I18n support.

Use Vite in Ruby and bring joy to your JavaScript experience

OpenID Connect extension for Doorkeeper.

Minitest integration for mutant

A fake filesystem. Use it in your tests.

Gradual Typing for Ruby

write_xlsx is a gem to create a new file in the Excel 2007+ XLSX format.