Encore provides serializers and persisters to build JSON API-compliant Web services with Ruby on Rails.

Entasis provides a few useful methods for building a basic class. Handy for models without a database.

EnumeratedField is a library that provides some nice methods when a string column is used like an enumeration, meaning there is a list of allowable values for the string column.

Enum machine is a library for defining enums and setting state machines for attributes in ActiveRecord models and plain Ruby classes.

Elasticity provides a higher level abstraction on top of [elasticsearch-ruby](https://github.com/elasticsearch/elasticsearch-ruby) gem

Make your Ruby objects searchable with Elasticsearch.

Explicit parameters validation and casting for Rails APIs

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Facturación Electrónica de Costa Rica

FmStore allow ActiveRecord-like read/write access to a FileMaker database.

A ruby client for the foscam SDK.

Decouple your forms from your domain models

Client library to interface with Smarthome features of your FritzBox

An implementation of the command pattern using dry-rb

Elasticsearch integrations for indexing git repositories.

Provides support for using Paranoia.

Golden Fleece lets you validate, normalize, set up defaults for and provide getters for JSON data in your Ruby data models through easy to use schemas. More opinionated and easier to use than JSON Schema.

Authentication Middleware for Gollum Wiki

A middleware for Grape to add endpoint-specific throttling.

OpenAPI 3.0 specification for your (Graphiti) JSON:API