Clamp provides an object-model for command-line utilities. It handles parsing of command-line options, and generation of usage help.

The Polyglot library allows a Ruby module to register a loader for the file type associated with a filename extension, and it augments require to find and load matching files.

SDoc is an RDoc documentation generator to build searchable HTML documentation for Ruby code.

Flores is a fuzzing, randomization, and stress library to help tests uncover more bugs.

Connection_pool provides a generic connection pooling interface for Ruby programs.

This package provides a small C extension to speed up variable length integers (varint) in Ruby Protocol Buffers.

This package provides a Jekyll plugin to silently generate a sitemaps.org compliant sitemap for your Jekyll site.

This gem extends ruby-rdf with several common RDF vocabularies.

Benchmark-ips enhances the Ruby Benchmark module with the iterations per second count. For short snippets of code, it can automatically figure out how many times to run the code to get interesting data.

This library can read and update netrc files, preserving formatting including comments and whitespace.

Test::Unit is unit testing framework for Ruby, based on xUnit principles. These were originally designed by Kent Beck, creator of extreme programming software development methodology, for Smalltalk's SUnit. It allows writing tests, checking results and automated testing in Ruby.

Shoulda Matchers provides RSpec- and Minitest-compatible one-liners that test common Rails functionality. These tests would otherwise be much longer, more complex, and error-prone.

Prawn is a pure Ruby PDF generation library.

TZInfo is a Ruby library that provides daylight savings aware transformations between times in different time zones.

This package provides a simple, fast MySQL library for Ruby, binding to libmysql.

TestConstruct is a DSL for creating temporary files and directories during tests.

WebMock allows stubbing HTTP requests and setting expectations on HTTP requests. This is useful when testing software.

This library allows rendering Scalable Vector Graphics (SVG) graphics directly into a Portable Document Format (PDF) document using the Prawn module.

EventMachine implements a single-threaded engine for arbitrary network communications. EventMachine wraps all interactions with sockets, allowing programs to concentrate on the implementation of network protocols. It can be used to create both network servers and clients.

Lumberjack is a simple logging utility that can be a drop in replacement for Logger or ActiveSupport::BufferedLogger. It provides support for automatically rolling log files even with multiple processes writing the same log file.

This package provides Ruby language binding for libvirt's native C API.

This package provides a set of Hoe plugins for tighter Git integration. It provides tasks to automate release tagging and pushing and changelog generation.

This package can be used to have the execution stopped for inspection in the Ruby debugger upon encountering a failure. To use it, set the RSPEC_DEBUG environment variable to true then invoke the rspec command as usual.

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality. The protocol is described in IMAP.