Campaign Monitor
Campaign Monitor provides a free email template builder that allows you to build mobile-ready templates, which display well on both desktop clients and mobile devices. Each template has been fully tested in all email clients, including Gmail and Outlook.
Once you've created a template, you can either import it into your Campaign Monitor account (if you have one), or download it for free. It's quick and easy to use, and boasts a wealth of options, including layout, color, language and even the type of email (announcement, newsletter, content-heavy or image gallery).
Price: Free