Cerberus
Patterns for responsive HTML email templates and newsletters
...The code blocks are compartmentalized so they may be used, removed, combined, and nested to build an email. Each template contains code comments and has good support among popular email clients. Cerberus is a small collection layout patterns for HTML email. The code is meant to be edited, adapted, and built upon. The code is compartmentalized and annotated in an effort to explain what’s happening so you can add, edit, and remove code with some confidence. This has been tested in all “popular” email clients, but not every email client out there. ...