Set of ActiveRecord validators for stuff like e-mails, URIs, post codes, etc.

Wall clock time for Ruby

A Firmata based Arduino library

WAMP client

WAMPv1 compliant server to be used as a skeleton for nice and shining Ruby apps, based on WebSocket EventMachine Server.

Change Japanese text to and from romaji, hiragana, and katakana. This gem is a port of WaniKani's JavaScript library.

Wanderung allows you to manage several migrations for several SQL databases

A ruby client which can access all Wanglu's API.

A JSON parser that enables streaming parsing and encoding of JSON

Air Quality Open Data Platform ruby wrapper

An educational pure-Ruby WebAssembly runtime

Plugin based attribute system for ruby objects

warehouse_items wrapper & value objects

Running one-off commands, templated scripts, or managing output from multiple servers

Slice deep-zoom images.

Unofficial Ruby wrapper for Pegel Online

Simple filesystem notification library for Ruby.

Checker of your origin

Gem to wrap waterspot.herokuapp.com API

Inspired by Gary Bernhardt's excellent wat talk.