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 attributes with I18n and ActiveRecord support

Adds enumerations to your models

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

Allows ActiveRecord to better use PostgreSQL's ENUM types.

A Ruby interface that allows to integrate any Epages Shop with any ruby framework via Epages Rest API.

Gem for dealing with epay.bg payments.

Ephemeral lets you define one-to-many relationships between in-memory objects, with ORM-like support for where clauses and chainable scopes.

Epuber is simple tool to compile and pack source files into EPUB format.

Erector is a Builder-like view framework, inspired by Markaby but overcoming some of its flaws. In Erector all views are objects, not template files, which allows the full power of object-oriented programming (inheritance, modular decomposition, encapsulation) in views.

Connects Mejuri with third-party ERP vendors

Correct strings based on remote errata files.

GitHub integration for Errbit

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.

Lightweight Ruby API for NCBI Eutils. This gem only provides API for NCBI Eutils. If you need full access to other NCBI databases, try BioRuby (bio gem) instead.

Generates HTML event calendars

Database based event counter with throttling per time intervals

simple elegant customize hooks

EventQ is a pub/sub system that uses async notifications and message queues