All your system-independent infoz in one handy class

https://github.com/delano/sysinfo

Portable replacement for popen4

https://github.com/ahoward/systemu

Command-line power tool for Twitter

https://sferik.github.io/t-ruby/ https://github.com/sferik/t-ruby

Emoji character information and metadata

https://gitlab.com/gitlab-org/tanuki_emoji

Calculates the differences between two tree-like structures

https://github.com/postmodern/tdiff

Collection of text algorithms

https://github.com/threedaymonk/text

Scripting framework that replaces rake, sake, and rubigen

https://github.com/rails/thor

Scripting framework that replaces rake, sake, and rubigen

https://github.com/erikhuda/thor

Thread-safe collections and utilities for Ruby

https://github.com/ruby-concurrency/thread_safe

Generic interface to multiple Ruby template engines

https://github.com/jeremyevans/tilt

Extend the Time class with methods for parsing and conversion

https://github.com/ruby/time

Fast date/time parser with customisable formats, timezone and I18n support

https://github.com/adzap/timeliness

Auto-terminate potentially long-running operations in Ruby

https://github.com/ruby/timeout

Ruby interface to TclTk-8.6

https://github.com/ruby/tk

Application instrumentation and tracing

https://socketry.github.io/traces/ https://github.com/socketry/traces

Dynamic options to evaluate at runtime

https://github.com/trailblazer/trailblazer-option

Minimal Train with a backends for ssh and winrm

https://github.com/inspec/train

Provide a transport to communicate easily with RESTful APIs

https://github.com/tecracer-chef/train-rest

Ruby-based DSL for text parsing and interpretation

https://github.com/cjheath/treetop

Friendly MySQL-compatible library for Ruby, binding to libtrilogy

https://github.com/trilogy-libraries/trilogy/tree/main/contrib/ruby

Commandline option parser for Ruby that gets out of your way

https://manageiq.github.io/trollop/

Font Metrics Parser for the Prawn PDF generator

https://github.com/prawnpdf/ttfunk

Turbolinks makes following links in your web application faster

https://github.com/turbolinks/turbolinks

Turbolinks JavaScript assets

https://github.com/turbolinks/turbolinks-source-gem

TweetStream provides simple Ruby access to Twitter Streaming API

https://github.com/tweetstream/tweetstream

Ruby interface to the Twitter API

https://sferik.github.io/twitter/ https://github.com/sferik/twitter-ruby

Twitter realtime API client

https://github.com/voloko/twitter-stream

Twitter client API in pure Ruby

https://github.com/twitter4r/twitter4r-core

Twitter OAuth REST API client library for Ruby

https://github.com/moomerman/twitter_oauth

Parallel HTTP request library

https://github.com/typhoeus/typhoeus

Parallel HTTP request library

https://github.com/typhoeus/typhoeus

Daylight-savings aware timezone support for Ruby

https://tzinfo.github.io/

IANA Time Zone database for TZInfo

https://tzinfo.github.io/ https://github.com/tzinfo/tzinfo-data

Daylight-savings aware timezone support for Ruby

https://tzinfo.github.io/

Library for handling registration and authentication of U2F devices

https://github.com/castle/ruby-u2f

Gem-authoring framework

https://github.com/apotonick/uber

Ruby wrapper for UglifyJS JavaScript compressor

https://github.com/lautis/uglifier

Xlib ruby toolkit

https://rubygems.org/gems/uh

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

Support for parsing Redis URIs like redis://host:port/dbindex

https://github.com/delano/uri-valkey

Templating system for URIs

https://github.com/hannesg/uri_template

Glue to allow mounted rack applications to know where they're mounted

https://github.com/hassox/url_mount

HTTP User Agent parser

https://github.com/gshutler/useragent

UUID generator library

https://github.com/assaf/uuid

Simple universally unique ID generation library

https://github.com/sporkmonger/uuidtools

Standalone, generic object validator for ruby

https://github.com/zombor/Validator

Library for adding database/object validations

http://validatable.rubyforge.org/

Validating email addresses in Rails 3 models

https://github.com/perfectline/validates_email/tree/master