Standard Gems 2.5.0

Also see: Gems introduced and removed in Ruby 2.5

Default Gems

Default Gem	2.5.0	2.4.10	Description	Resources
bigdecimal c	1.3.4	1.3.2	Support for arbitrary-precision floating point decimal arithmetic	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2) · JRuby (3)
cmath	1.0.0	-	Trigonometric and transcendental functions for complex numbers	RubyGems · GitHub · RDoc
csv	1.0.0	-	Support for CSV (Comma-separated Values)	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2)
date c	1.0.0	-	The Date and DateTime classes	RubyGems · GitHub · RDoc (1) · RDoc (2) · CRuby · JRuby (1) · JRuby (2) · JRuby (3)
dbm c	1.0.0	-	Support for DBM databases	RubyGems · GitHub · RDoc
etc c	1.0.0	-	Access UNIX info from `/etc`	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)
fcntl c	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	-	Support for FFI (Foreign Function Interface)	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)
fileutils	1.0.2	-	Utilities for working with the file system, such as copying, moving, or deleting files	RubyGems · GitHub · RDoc · CRuby · JRuby (1)
gdbm c	2.0.0	-	Support for GDBM databases	RubyGems · GitHub · RDoc
io-console c	0.4.6	0.4.6	Patches `IO` for simple and portable access to the console	RubyGems · GitHub · RDoc · CRuby
ipaddr	1.2.0	-	IP address manipulation (IPv4 and IPv6)	RubyGems · GitHub · RDoc · CRuby
json c	2.1.0	2.0.4	Support for JSON (JavaScript Object Notation)	RubyGems · GitHub · RDoc · CRuby
openssl c	2.1.0	2.0.9	Wraps OpenSSL for cryptographic functionality	RubyGems · GitHub · RDoc · CRuby
psych c	3.0.2	2.2.2	Support for YAML (YAML Ain't Markup Language)	RubyGems · GitHub · RDoc · CRuby
rdoc	6.0.1	5.0.1	Ruby documentation generator	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2)
rubygems	2.7.3	2.6.14.4	RubyGems allows you to download, install, and use Ruby software packages on your system	RubyGems · GitHub · RDoc · CRuby (1) · CRuby (2) · JRuby (1)
scanf	1.0.0	-	Pure-Ruby scanf implementation	RubyGems · GitHub · RDoc
sdbm c	1.0.0	-	Support for SDBM databases	RubyGems · GitHub · RDoc
stringio c	0.0.1	-	Makes strings behave like IO objects	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)
strscan c	1.0.0	-	Lexical string scanning	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)
webrick	1.4.2	1.3.1	HTTP Server	RubyGems · GitHub · RDoc
zlib c	1.0.0	-	Interface to the zlib compression library	RubyGems · GitHub · RDoc · CRuby · JRuby (1) · JRuby (2)

Bundled Gems

Bundled Gem	2.5.0	2.4.10	Description	Resources
did_you_mean	1.2.0	1.1.0	Patches error messages to suggest correct spelling of methods/classes/variables	RubyGems · GitHub · RDoc
minitest	5.10.3	5.10.1	Test/spec framework, comes with mocking and benchmark capabilities	RubyGems · GitHub · RDoc
net-telnet	0.1.1	0.1.1	Support for Telnet	RubyGems · GitHub · RDoc
power_assert	1.1.1	0.4.1	Debug tool that displays intermediate results of a method chain	RubyGems · GitHub · RDoc
rake	12.3.0	12.0.0	A Ruby task runner, inspired by make	RubyGems · GitHub · RDoc
test-unit	3.2.7	3.2.3	A xUnit family unit testing framework (compatibility layer for minitest)	RubyGems · GitHub · RDoc
xmlrpc	0.3.0	0.2.1	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