The Ruby Programming Language

RDoc produces HTML and online documentation for Ruby projects.

A make-like build utility for Ruby.

JSON implementation for Ruby

Provides lexical scanning operations on a String.

Nokogiri (鋸) makes it easy and painless to work with XML and HTML from Ruby.

Net::HTTP provides a rich library which can be used to build HTTP user-agents.

interactive Ruby

CGI is a large class, providing several categories of methods, many of which are mixed in from other modules.

There was no free Dictionary API on the web when I wanted one for my friend, so I created one.

Arbitrary-precision decimal floating-point number library for Ruby

CSV Reading and Writing

Yet Another Ruby Parser

Pseudo `IO` class from/to `String`.

This class implements a pretty printing algorithm.

PStore implements a file based persistence mechanism based on a Hash.

simple logging utility

Library packaging and distribution for Ruby.

A subclass of Object includes Comparable module for handling dates.

OptionParser is a class for command-line option analysis.

Several file utility methods for copying, moving, removing, etc.

This library provides the Set class, which deals with a collection of unordered values with no duplicates.

URI is a module providing classes to handle Uniform Resource Identifiers

A simple online fake REST API server

OpenStruct implementation

A utility class for managing temporary files.

The GetoptLong class allows you to parse command line options similarly to the GNU getopt_long() C library call.

The Python programming language