This gem can be useful, if you need to upload files to your API from mobile devises.

Provides datasets to application stored in YAML files

DbCharmer is a Rails plugin (and gem) that could be used to manage AR model connections, implement master/slave query schemes, sharding and other magic features many high-scale applications need.

Twitter Client on Terminal with Twitter Streaming API.

Foundation on Sass/Compass

A normaliser/beautifier for HTML that also understands embedded Ruby.

Streamline your writing in Jekyll with these commands.

Pure Ruby readonly serializers for the JSON:API spec.

Simple Ruby implementations of some common monads.

A set of handy tools to upgrade your Rails application and keep it up to date

Application registry inspired by Apache Zookeeper

CAS 3.0 Strategy for OmniAuth

RDF.rb is a pure-Ruby library for working with Resource Description Framework (RDF) data.

The ruby client for Recurly's V3 API

RSpec matchers for Resque

Russian language support for Ruby and Rails

Declarative SAX Parsing with Nokogiri, Ox or Oga

Send notifications to Slack about Capistrano deployments.

Simple OAuth 2.0 provider toolkit

Whois Parser is a WHOIS parser written in pure Ruby. It can parse and convert responses into easy-to-use Ruby objects.