Magic: The Gathering SDK is a wrapper around the MTG API located at magicthegathering.io

Mulang JS wrapper gem

MySQL slow query parser.

Ruby wrapper for Amazon CloudSearch (aws-sdk), with ActiveRecord, Mongoid support for easy integration with your Rails application

Writer methods parameters normalization

Act as Notified is a flexible framework to add notifications to a Rails application

Use any toolchain to bulid your asset files in Rails 4.2. Integrate Brunch, Gulp, Grunt, Webpack, Browserify and others seamlessly into Rails apps.

Free Online OCR for Ruby - Convert images to text

Easily deploy any Jekyll or Octopress site using S3, Git, or Rsync.

View docs for Octopress and its plugins

Provides a simple interface for working with OData APIs.

Simple Ruby library for parsing Open Graph prototocol information. See http://ogp.me for more information.

OmniAuth strategy for Lightspeed.

OmniAuth support for multiple providers of an authentication strategy

OmniAuth OAuth2 strategy for Okta

Twitch OAuth2 Strategy for OmniAuth

Onotole is a Rails project generator that you can upgrade. Use Onotole if you're in a rush to build something amazing or just want to test out some new technologes. You can choose more than 50 gems to add and get all of it with init settings and be free from init confings copy/paste

Opal compatible RSpec library

A parser for Open API specifications

The implementation of the Open Assets Protocol for Ruby.