Messenger: easy message sending for various protocols.

Easily switch between email APIs

Pig Media Server

Checks puppet manifests for security related problems.

Rack middleware to send email when exceptions are raised

Deliver mail in a resque job

A unified interface for various messaging queues

Roust is a Ruby API client to access Request Tracker's REST interface.

Rumbster is a simple SMTP server that receives email sent from a SMTP client. Received emails are published to observers that have registered with Rumbster. There are currently two observers; FileMailObserver and MailMessageObserver.

RUby Simple Exception Notification (a.k.a. rusen) as it names indicates is a simple exception notification for ruby.

Application framework for state based session management

Sensu monit plugins

Sensu sms plugins

SMTP Proxy for Amazon Simple Email Service with bounce and complaints support

SimplePostmark makes it easy to send mails via Postmark using Rails's ActionMailer.

SimplePostmark makes it easy to send mails via Postmark™ using Rails 3's ActionMailer.

Send mail with handlebars like templates

Real time IP parsing and rate detection gem for access_log files

Spider is yet another Ruby framework.

Easy way of sending DKIM-signed emails from Ruby, no dependencies needed.