HTMLProofer is a set of tests to validate your HTML output. These tests check if your image references are legitimate, if they have alt tags, if your internal links are working, and so on. It's intended to be an all-in-one checker for your output.

The Listen gem listens to file modifications and notifies you about the changes.

This package provides actionable code coverage reports for Ruby projects. It has very little overhead and can be easily integrated with development tools to catch coverage problems early.

RSpec::Wait strives to make it easier to test asynchronous or slow interactions.

Dalli is a high performance pure Ruby client for accessing memcached servers. Dalli supports:

• Simple and complex memcached configurations

• Fail-over between memcached instances

• Fine-grained control of data serialization and compression

• Thread-safe operation

• SSL/TLS connections to memcached

• SASL authentication.

The name is a variant of Salvador Dali for his famous painting The Persistence of Memory.

This package provides a collection of RuboCop cops to check for performance optimizations in Ruby code.

ruby-hydra-minimal is a Ruby library for working with hyphenation patterns. It is a low-dependency variant of ruby-hydra.

This package provides Ruby FFI bindings to the Networking and Cryptography (NaCl) library, also known as libsodium. This provides a high-level toolkit for building cryptographic systems and protocols.

Provides empty Module#ruby2_keywords method, for the forward source-level compatibility against ruby2.7 and ruby3.

Spy is a mocking library. By default, it will raise an error if you attempt to stub a method that doesn't exist or call the stubbed method with the wrong arity.

ruby_engine provides an RubyEngine class that can be used to check which implementation of Ruby is in use. It can provide the interpreter name and provides query methods such as RubyEngine.mri?.

nio provides cross-platform asynchronous I/O primitives in Ruby for scalable network clients and servers.

Warden is a Rack-based middleware that provides a mechanism for authentication in Ruby web applications.

This Ruby library provides a simple wrapper to bcrypt, a secure hash algorithm for hashing passwords.

Backports enables more compatibility across Ruby versions by providing backports of some features.

ExecJS lets you run JavaScript code from Ruby. It automatically picks a runtime to evaluate your JavaScript program, then returns the result to you as a Ruby object.

Ruby-terminfo provides terminfo binding for Ruby.

This library provides TZInfo::Data, which contains data from the IANA Time Zone database packaged as Ruby modules for use with TZInfo.

RubyMoney provides a library for dealing with money and currency conversion. Its features are:

• Provides a Money class which encapsulates all information about a certain amount of money, such as its value and its currency.

• Provides a Money::Currency class which encapsulates all information about a monetary unit.

• Represents monetary values as integers, in cents; so avoids floating point rounding errors.

• Represents currency as Money::Currency instances providing a high level of flexibility.

• Provides APIs for exchanging money from one currency to another.

This package provides a implementations of custom cops that are bundled as defaults in Standard Ruby.

This package provides a gem that calculates the exchange rate using published rates from open-exchange-rates. Compatible with the money gem.

Redcarpet is an extensible Ruby library for Markdown processing and conversion to (X)HTML.

SilentStream is an extraction of some parts of ActiveSupport's Kernel Reporting Core Extensions around silencing IO streams.

Org-ruby is an org-mode parser written in Ruby. The most significant thing this library does today is convert org-mode files to HTML or Textile or Markdown.