date

The official date library for Ruby.

$gem install date

Official docs outline

Extra Credit builds an outline of date's docs the first time your work uses it. Until then, start at the official documentation.

rubocop-performance A collection of RuboCop cops to check for performance optimizations in Ruby code.
faraday-patron Faraday adapter for Patron
rouge Rouge aims to a be a simple, easy-to-extend drop-in replacement for pygments.
eventmachine EventMachine implements a fast, single-threaded engine for arbitrary network communications. It's extremely easy to use in Ruby. EventMachin
faraday-rack Faraday adapter for Rack
arel Arel Really Exasperates Logicians Arel is a SQL AST manager for Ruby. It 1. Simplifies the generation of complex SQL queries 2. Adapts to
memoist memoize methods invocation
net-protocol The abstract interface for net-* client.
rubocop-rails Automatic Rails code style checking tool. A RuboCop extension focused on enforcing Rails best practices and coding conventions.
jbuilder Create JSON structures via a Builder-style DSL
digest-crc Adds support for calculating Cyclic Redundancy Check (CRC) to the Digest module.
daemons Daemons provides an easy way to wrap existing ruby scripts (for example a self-written server) to be run as a daemon and to be controll