Standard Gems 2.7.1

Default Gems

Default Gem	2.7.1	2.7.0	Description	Resources
benchmark	0.1.0	0.1.0	Benchmark utility: Measures and reports the time used to execute code	RubyGems · GitHub · RDoc · CRuby
bigdecimal c	2.0.0	2.0.0	Support for arbitrary-precision floating point decimal arithmetic	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2) · JRuby (3)
bundler	2.1.4	2.1.2	Bundler is the local package manager for Ruby applications	RubyGems · GitHub · RDoc · CRuby
cgi c	0.1.0	0.1.0	Support for CGI (Common Gateway Interface)	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2) · CRuby (3) · JRuby (1)
csv	3.1.2	3.1.2	Support for CSV (Comma-separated Values)	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2)
date c	3.0.0	3.0.0	The Date and DateTime classes	RubyGems · GitHub · RDoc (1) · RDoc (2) · CRuby · JRuby (1) · JRuby (2) · JRuby (3)
dbm c	1.1.0	1.1.0	Support for DBM databases	RubyGems · GitHub · RDoc
delegate	0.1.0	0.1.0	Provides three ways to delegate method calls	RubyGems · GitHub · RDoc · CRuby
did_you_mean	1.4.0	1.4.0	Patches error messages to suggest correct spelling of methods/classes/variables	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2)
etc c	1.1.0	1.1.0	Access UNIX info from `/etc`	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)
fcntl c	1.0.0	1.0.0	Loads values from the OS' `fcntl.h` to be used for low-level file descriptor manipulation system calls with IO#fcntl and IO.sysopen	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)
fiddle c	1.0.0	1.0.0	Support for FFI (Foreign Function Interface)	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)
fileutils	1.4.1	1.4.1	Utilities for working with the file system, such as copying, moving, or deleting files	RubyGems · GitHub · RDoc · CRuby · JRuby (1)
forwardable	1.3.1	1.3.1	Provides a way to delegate method calls. Also see this overview of delegation in Ruby, which contains an example	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2) · CRuby (3)
gdbm c	2.1.0	2.1.0	Support for GDBM databases	RubyGems · GitHub · RDoc
getoptlong	0.1.0	0.1.0	GNU getopt_long() style command-line option parsing	RubyGems · GitHub · RDoc · CRuby
io-console c	0.5.6	0.5.3	Patches `IO` for simple and portable access to the console	RubyGems · GitHub · RDoc · CRuby
ipaddr	1.2.2	1.2.2	IP address manipulation (IPv4 and IPv6)	RubyGems · GitHub · RDoc · CRuby
irb	1.2.3	1.2.1	Interactive Ruby Console (REPL)	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2)
json c	2.3.0	2.3.0	Support for JSON (JavaScript Object Notation)	RubyGems · GitHub · RDoc · CRuby
logger	1.4.2	1.4.2	Logging utility	RubyGems · GitHub · RDoc · CRuby
matrix	0.2.0	0.2.0	Support for matrices	RubyGems · GitHub · RDoc
mutex_m	0.1.0	0.1.0	A mixin that makes any object behave like a mutex	RubyGems · GitHub · RDoc · CRuby
net-pop	0.1.0	0.1.0	Support for POP3 (Post Office Protocol)	RubyGems · GitHub · RDoc
net-smtp	0.1.0	0.1.0	Support for SMTP (Simple Mail Transfer Protocol)	RubyGems · GitHub · RDoc
observer	0.1.0	0.1.0	Implementation of the observer pattern, a way to let interested other objects know o an objetc's updates	RubyGems · GitHub · RDoc · CRuby
open3	0.1.0	0.1.0	Simple spawning of child processes	RubyGems · GitHub · RDoc · CRuby · JRuby
openssl c	2.1.2	2.1.2	Wraps OpenSSL for cryptographic functionality	RubyGems · GitHub · RDoc · CRuby
ostruct	0.2.0	0.2.0	Wrapper around Hash which lets you read and set attributes with a method-based API	RubyGems · GitHub · RDoc · CRuby
prime	0.1.1	0.1.1	Access to prime numbers and prime factorization	RubyGems · GitHub · RDoc
pstore	0.1.0	0.1.0	Transactional file storage for Ruby objects	RubyGems · GitHub · RDoc · CRuby
psych c	3.1.0	3.1.0	Support for YAML (YAML Ain't Markup Language)	RubyGems · GitHub · RDoc · CRuby
rdoc	6.2.1	6.2.1	Ruby documentation generator	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2)
readline	0.0.2	0.0.2	If available, readline-ext will be loaded, or (Ruby-only) reline will be used.	RubyGems · GitHub · RDoc · CRuby
readline-ext c	0.1.0	0.1.0	Interface to GNU Readline and NetBSD Editline	RubyGems · GitHub · RDoc · CRuby
reline	0.1.3	0.1.2	Ruby-only implementation of GNU Readline / NetBSD Editline	RubyGems · GitHub · RDoc · CRuby
rexml	3.2.3	3.2.3	Support for XML (Extensible Markup Language)	RubyGems · GitHub · RDoc
rss	0.2.8	0.2.8	Support for RSS (Rich Site Summary) and Atom	RubyGems · GitHub · RDoc
rubygems	3.1.2	3.1.2	RubyGems allows you to download, install, and use Ruby software packages on your system	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2) · JRuby (1)
sdbm c	1.0.0	1.0.0	Support for SDBM databases	RubyGems · GitHub · RDoc
singleton	0.1.0	0.1.0	Mixin for Ruby classes that should only have one instance	RubyGems · GitHub · RDoc · CRuby
stringio c	0.1.0	0.1.0	Makes strings behave like IO objects	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)
strscan c	1.0.3	1.0.3	Lexical string scanning	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)
timeout	0.1.0	0.1.0	Auto-terminates code blocks after the time limit is reached	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)
tracer	0.1.0	0.1.0	Outputs the code execution trace via Kernel#set_trace_func	RubyGems · GitHub · RDoc
uri	0.10.0	0.10.0	URI/URL manipulation	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2) · JRuby (1) · JRuby (2)
webrick	1.6.0	1.6.0	HTTP Server	RubyGems · GitHub · RDoc
yaml	0.1.0	0.1.0	`require 'yaml'` will load the psych default gem, yaml/dbm is a wrapper around DBM using YAML serialization, and yaml/store lets you use pstore with YAML	RubyGems · GitHub · RDoc (1) · RDoc (2) · RDoc (3) · CRuby (1) · CRuby (2) · CRuby (3) · JRuby (1) · JRuby (2)
zlib c	1.1.0	1.1.0	Interface to the zlib compression library	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)

Bundled Gems

Bundled Gem	2.7.1	2.7.0	Description	Resources
minitest	5.13.0	5.13.0	Test/spec framework, comes with mocking and benchmark capabilities	RubyGems · GitHub · RDoc
net-telnet	0.2.0	0.2.0	Support for Telnet	RubyGems · GitHub · RDoc
power_assert	1.1.7	1.1.5	Debug tool that displays intermediate results of a method chain	RubyGems · GitHub · RDoc
rake	13.0.1	13.0.1	A Ruby task runner, inspired by make	RubyGems · GitHub · RDoc
test-unit	3.3.4	3.3.4	A xUnit family unit testing framework (compatibility layer for minitest)	RubyGems · GitHub · RDoc
xmlrpc	0.3.0	0.3.0	Remote Procedure Calls via XML and HTTP	RubyGems · GitHub · RDoc

More Standard Gems

General information about standard gems
Gem list for Ruby: 3.2.0 (preview)
Gem list for Ruby: 3.1.2 · 3.1.1 · 3.1.0
Gem list for Ruby: 3.0.4 · 3.0.3 · 3.0.2 · 3.0.1 · 3.0.0
Gem list for Ruby: 2.7.6 · 2.7.5 · 2.7.4 · 2.7.3 · 2.7.2 · 2.7.1 · 2.7.0
Gem list for Ruby: 2.6.10 · 2.6.9 · 2.6.8 · 2.6.7 · 2.6.6 · 2.6.5 · 2.6.4 · 2.6.3 · 2.6.2 · 2.6.1 · 2.6.0
Gem list for Ruby: 2.5.9 · 2.5.8 · 2.5.7 · 2.5.6 · 2.5.5 · 2.5.4 · 2.5.3 · 2.5.2 · 2.5.1 · 2.5.0
Gem list for Ruby: 2.4.10 · 2.4.9 · 2.4.8 · 2.4.7 · 2.4.6 · 2.4.5 · 2.4.4 · 2.4.3 · 2.4.2 · 2.4.1 · 2.4.0
Gem list for Ruby: 2.3.8 · 2.3.7 · 2.3.6 · 2.3.5 · 2.3.4 · 2.3.3 · 2.3.2 · 2.3.1 · 2.3.0
Gem list for Ruby: 2.2.10 · 2.2.9 · 2.2.8 · 2.2.7 · 2.2.6 · 2.2.5 · 2.2.4 · 2.2.3 · 2.2.2 · 2.2.1 · 2.2.0
Compare versions: Main Rubies · Supported Rubies · All Rubies · 3.1 · 3.0 · 2.7 · 2.6 · 2.5 · 2.4 · 2.3 · 2.2
Gemified in: 3.1 · 3.0 · 2.7 · 2.6 · 2.5 · 2.4 · 2.3 · 2.2
List of Non-Gem Default Libraries
List of Unmaintained Default Gems
List of Removed Standard Gems