Provides a Ruby library to the complete Bitcoin JSON-RPC API. Implements all methods listed at https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_Calls_list and lets you set options such as the host and port number, and whether to use SSL.

This SDK contains wrapper code used to call the Evernote Cloud API from Ruby.

Handle iTunes In App Purchase Receipt Verification

Monittr provides a Ruby interface for loading and displaying statistics from multiple Monit instances and helpers for Sinatra web applications.

To have all your data in one place: the database

Pivotal Tracker Command Line Interface

eBayR is a gem that makes it (relatively) easy to use the eBay Trading API from Ruby. Includes a self-contained XML parser, a flexible callback system, and a command-line client which aids integration into other projects.

REST API to Quickbooks Online/Windows via Intuit Data Services

Bootstrap a micro bosh universe from one CLI

Ruby library for Geonames Web Services (http://www.geonames.org/export/)

yet another command line client for gist. Gisty uses Github API V3 via OAuth2.

The New Relic Plugin Gem is used to send plugin data to New Relic from non-application sources.

The official PagSeguro library

Rack middleware Captcha verification using Recaptcha API.

A Sinatra extension for building Shopify Apps. Akin to the shopify_app gem but for Sinatra

check values from a graphite server

gtfs reads GTFS data from a google-compliant Zip bundle and returns an object representing the CSV data inside

OmniAuth strategy for Kakao(http://developers.kakao.com/)

Extracts the Plex Media Server API into easy to write ruby code

ScrApify scraps static html sites to RESTlike APIs