Mocha is a mocking and stubbing library with JMock/SchMock syntax, which allows mocking and stubbing of methods on real (non-mock) classes.

This package provides bindings for any kind of Ruby exceptions.

Pry Doc is a Pry REPL plugin. It provides extended documentation support for the REPL by means of improving the show-doc and show-source commands. With help of the plugin the commands are be able to display the source code and the docs of Ruby methods and classes implemented in C.

Coderay is a Ruby library that provides syntax highlighting for select languages.

Rack provides a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses, it unifies the API for web servers, web frameworks, and software in between into a single method call.

Bump provides commands to manage Rubygem versioning, updating to the next patch version for example.

This package provides a Ruby parser written in pure Ruby.

Orderedhash is a Ruby library providing a hash implementation that preserves the order of items and features some array-like extensions.

KPeg is a simple PEG library for Ruby. It provides an API as well as native grammar to build the grammar. KPeg supports direct left recursion of rules via the OMeta memoization technique.

This package provides a Language Server Protocol (LSP) development kit for Ruby.

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.

websocket-extensions provides a container for registering extension plugins.

This gem is a simple callback-based HTTP request/response parser for writing http servers, clients and proxies.

This library provides functionality for retrieving email via POP3, the Post Office Protocol version 3, as specified by RFC1939.

cliver provides a way to detect missing command-line dependencies, including versions.

Like a modern code version of the mythical beast with 100 serpent heads, Typhoeus runs HTTP requests in parallel while cleanly encapsulating handling logic.

MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set your favourite app to deliver to smtp://127.0.0.1:1025 instead of your default SMTP server, then check out http://127.0.0.1:1080 to see the mail.

RSpec::Its provides the its method as a short-hand to specify the expected value of an attribute. For example, one can use its(:size)\should eq(1)\.

This Ruby library provides an implementation of the Matrix and Vector classes. The Matrix class represents a mathematical matrix. It provides methods for creating matrices, operating on them arithmetically and algebraically, and determining their mathematical properties (trace, rank, inverse, determinant, eigensystem, etc.). The Vector class represents a mathematical vector, which is useful in its own right, and also constitutes a row or column of a Matrix.

Ruby Rsync is a Ruby library that can synchronize files between remote hosts by wrapping the rsync binary.

This package provides a gem to convert LaTeX input to Unicode. Its original use was as an input filter for BibTeX-Ruby, but it can be used independently to decode LaTeX. Many of the patterns used by this Ruby gem are based on François Charette's equivalent Perl module LaTeX::Decode.

This module adds support for the TomDoc documentation format to YARD, a documentation generation tool for Ruby.

This package provides a function to deep freeze Ruby objects.

This package provides a Ruby interface for secure random number generators.