The spark_api gem handles most of the boilerplate for communicating with the Spark API rest services, including authentication and request parsing.

The Square Connect Ruby SDK is retired. Please migrate to the new Square gem: https://github.com/square/square-ruby-sdk

A Ruby interface to the Uber API.

For Libraries, a just-in-time last-mile service aggregator, taking OpenURL input

Ruby bindings to create, list and manage vCloud servers

A Ruby interface to WhatsApp Enterprise API.

A Ruby wrapper for accessing Yammer's REST API

Description of Connect.

A Ruby client library for ably.io realtime messaging

AppFog.com CLI

Alexa Web Information Service library (AWIS)

Combined events calendar for Google Calendar, iCal, and friends.

Alpaca API lets you build and trade with real-time market data for free.

Amplitude Experiment Ruby Server SDK

This library provides Ruby calls to interact with the Avalara Tax API

Ruby client for Avatax

A set of helper methods that are webdriven.

The unofficial X-Ray Tracing SDK for Ruby.

A Ruby wrapper for the Behance API

BlockScore makes ID verification easier and faster. See https://blockscore.com for more.