Beefree.io: A beautiful and free email designing app
This is the best email designing app for you and probably if I am not wrong it is the very first free Email Designer which offers modern user interface and so many other features all for free.
Those who convert PSD email design into html for different ESP like Gmail, Yahoo, Aol, Hotmail etc., they are gonna just love it forever.
You can create beautiful, responsive email design with the help of awesome tools. To kick-start your very first campaign on Beefree.io you can choose their inbuilt email templates then start customizing and make it unique as per your sketch design.
Once you are done with your design you can simply download the template files along with images and then can further use the same on your preferred email/mass mail server to start your email campaign.
Beefree.io does not ask any user information to sign up, it use only your web browser to save temporary data in your web browser.