It just makes sense to store mutable, site-wide, admin-level settings in the database. Right? A key-value table may be more flexible, but maybe we don't want to be flexible! If you truly want that flexibility: http://github.com/stephencelis/kvc

AppFog.com CLI

A respond_to style Rails block for baked-in web service support in Sinatra

Provides algebraic type definitions and pattern matching

[⚠ DEPRECATED ⚠]: Use jekyll-algolia instead

Creates aliases of ActiveRecord named scopes.

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

Alphabetical Pagination

I am altria.

Amplitude Experiment Ruby Server SDK

ActiveModel Serializers addon for eliminating N+1 queries problem from the serializers.

Android Push Notification in Ruby: simple, fast, high-quality client for FCM (Firebase Cloud Messaging)

Text classifier with HBase, Cassandra, or Mongo storage

A ruby implementation of Ansible's vault utilities. Currently supports the AES256 variant, no support for the original AESformat is planned.

Bindings for API calls that are documented with Apipie. Bindings are generated on the fly.

Ruby implementation of GraphQL trace data in the Apollo Tracing format.

Integration with Apple Sign In and Devise for backend. Validate and Verify user token.

Record the operation of a Ruby program, using the AppLand 'AppMap' format.

A Blacklight-based environment to support discovery and delivery for archives and special collections

Arduino Firmata protocol (http://firmata.org) implementation on Ruby.