Open4 manages child processes and their io handles

https://github.com/ahoward/open4

Wrap the OpenSSL library

https://github.com/ruby/openssl

Wrap the OpenSSL library

https://github.com/ruby/openssl

Class to build custom data structures, similar to a Hash

https://github.com/ruby/ostruct

Representation of the name of a file or directory on the filesystem

https://github.com/ruby/pathname

Ruby interface to PostgreSQL library

https://github.com/ged/ruby-pg

Ruby interface to PostgreSQL library

https://github.com/ged/ruby-pg

Provide a PrettyPrinter for Ruby objects

https://github.com/ruby/pp

Pretty printing algorithm for readable structure

https://github.com/ruby/prettyprint

Prime numbers and factorization library

https://github.com/ruby/prime

Transactional File Storage for Ruby Objects

https://github.com/ruby/pstore

LALR(1) parser generator for Ruby

https://github.com/ruby/racc

Alternative GNU Readline or Editline implementation by pure Ruby

https://github.com/ruby/reline

XML toolkit for Ruby

https://github.com/ruby/rexml

Simple, easy-to-extend drop-in replacement for pygments

https://github.com/jneen/rouge

Simple, easy-to-extend drop-in replacement for pygments

https://github.com/jneen/rouge

Simple, easy-to-extend drop-in replacement for pygments

https://github.com/jneen/rouge

Ruby interface to termios

https://github.com/arika/ruby-termios

Shim library for Module#ruby2_keywords

https://github.com/ruby/ruby2_keywords

Ruby module for reading and writing zip files

https://github.com/rubyzip/rubyzip

Ruby module for reading and writing zip files

https://github.com/rubyzip/rubyzip

Simple file-based key-value store with String keys and values

https://github.com/ruby/sdbm

Interface for secure random number generator

https://github.com/ruby/securerandom

Implement the Singleton pattern

https://github.com/ruby/singleton

Pseudo IO class from/to String

https://github.com/ruby/stringio

Portable replacement for popen4

https://github.com/ahoward/systemu

Tarantool KV-storage client

https://github.com/tarantool/tarantool-ruby

Extend the Time class with methods for parsing and conversion

https://github.com/ruby/time

Auto-terminate potentially long-running operations in Ruby

https://github.com/ruby/timeout

Ruby interface to TclTk-8.6

https://github.com/ruby/tk

Topological sorting using Tarjan's algorithm

https://github.com/ruby/tsort

Wrapper library to bring Unicode Normalization Form support

https://github.com/knu/ruby-unf

Provide classes to handle Uniform Resource Identifiers

https://github.com/ruby/uri

Provide classes to handle Uniform Resource Identifiers

https://github.com/ruby/uri

Library for adding database/object validations

http://validatable.rubyforge.org/

HTTP server toolkit

https://github.com/ruby/webrick

Ruby take off of p5-XML-Simple

https://github.com/maik/xml-simple

Ruby take off of p5-XML-Simple

https://github.com/maik/xml-simple

Ruby standard library package 'xmlrpc'

https://github.com/ruby/xmlrpc

Scan_ffs recovers lost disklabel

Tiny shell that only permits scp and sftp

https://github.com/scponly/scponly/wiki

Converts the output of "vidcontrol -p" to PNG

Checks installed packages for vulnerabilities

http://github.com/laffer1/security-advisory-client/

Set of utilities that send SCSI commands to devices

http://sg.danny.cz/sg/sg3_utils.html

Generates groff and HTML from linuxdoc and docbook SGML documents

The "meta-port" for the SKK Japanese-input software

http://openlab.jp/skk/

Softflowd is flow-based network traffic analyser with export

http://www.mindrot.org/softflowd.html

Traps spammers with a very slow smtp-login and return 4xx error

http://freebsdspamd.sourceforge.net/

Monospaced bitmap fonts for Xorg and vt(4)

https://github.com/fcambus/spleen

Mount a squashfs archive and treat it like a local file system

https://github.com/vasi/squashfuse