Author
Sean Powell

Contributors and/or those highly referenced
Neil Bradley
Brian Blakely
Emil Christensen
Steve De Jonghe https://github.com/seutje
Ed Melly
Ros Hodgekiss
Fabio Carneiro
patrickkettner

With plenty of help from these cool peeps
Campaign Monitor
MailChimp
Email on Acid (Another nice boilerplate at http://www.emailology.org/#1)
Litmus