Mailivery - Reach the Inbox, not the spam folder.
Newsletter Guide - A 201 guide for taking your newsletters to the next level
Sidemail - The simplest way to send transactional emails. Sidemail makes sending transactional emails trivial, it's perfect for side projects, MVPs or the next big thing.
Newsletters by Refind - The easiest way to email a link digest to your fans
Postal - Open source mail delivery platform, alternative to Mailgun or Sendgrid
Newsletter Crew - Podcast, blog, and community for newsletter creators.