keynote-client provides a high level API like ActiveRecord style to control your Keynote.

it said optional

kitchen-terraform is a set of Test Kitchen plugins for testing Terraform configuration

VMware vcair support for Chef's Knife command

REST client for KOSapi service

Crash your Kerbals using Ruby!

Lago Rest API client

Talk to rabbits

Rose colored stained glass windows for HTTP.

A gem to interface with LEGO MINDSTORMS NXT bricks.

A Ruby parser and builder for the OMA protocol (a.k.a. Data Communication Standard) that was developed by the Lens Processing & Technology Division of The Vision Council for interconnection of optical laboratory equipment.

Client for the LINE notify API

A lita extension to build wizards

A wrapper to the Litmus customer API

Ruby client library for Litmus Instant API, provides the simplest way to capture instant email previews in real clients from Ruby.

The CloudFormation Framework

API client for GBG Loqate

A simple LRU-cache based on a hash and priority queue

A collection of useful patterns we (Springer Nature) use in our Ruby applications.

A content management framework for Rails (compatible with 3.1 and 3.2)