Lots of styles and helpers we used for several projects.

Magis Framework Gem

An unofficial Magister API wrapper for ruby

The CLI for the 'magister' gem

Cluster-based process / worker manager

Parse code pushes from multiple code hosting platforms

Export your MailChimp data

Allows you to call MailChimp <-> Amazon SES integration methods.

Mailchimp Transactional Ruby SDK

A simple queue API with a maildir backend. Also includes an HTTP API

Ruby wrapper for Maileon email marketing software API.

A library for interfacing with the Mailgun API

Ruby client for Mailgun API that provides methods to use subset Mailgun Events and Storage API functionality as a disposable email address service.

Fork of Mailgun's Official Ruby SDK for interacting with the Mailgun API.

Basic Mailjet ActionMailer support

Ruby wrapper library for GNU Mailman's admin functions

Gem for inbound mail via Postfix MTA. Creates separate worker process for delivery to app.

Target.Mail.ru api via oauth2

Extends Mail Safe to look for and sanitize Sendgrid specific X-SMTPAPI headers

Fork from Rufus RTM gem