VerticalResponse comes with a modern interface and design. You can easily create new emails using drag and drop and a lot of options personalize it as you want.
Import contacts and create different email lists, create and categorize sign-up forms, create autoresponders to send emails automatically and even post on your social pages such as Facebook or Twitter. It includes many themes and mobile-friendly newsletter templates.
All important features are included. It does not have email testing.
VerticalResponse has a simple and modern interface, but includes all essential features and a lot of beautiful templates to help you to create email campaigns.