17- MailChimp

 MailChimp allows you to easily create newsletters of varying types and then provides simple options for sharing them on social networks such as Twitter or Facebook, making it your own personal platform for publishing your newsletter. MailChimp service is accessible both via its website and a smartphone app. It also helps you track your results so you can check the responses that you receive from your clients. This gives you a better idea about how you can make changes to your campaign in order to get a more positive response for your page!

Benefits

+ MailChimp is free- If you have 2000 names or less you don't have to pay a monthly subscription. This program is great if you are just starting your email list and don’t have many names.
+ MailChimp integrates with Twitter- Mail Chimp lets your readers share your newsletter with their Twitter followers with one click. Even if you don’t use Twitter this can be a big platform builder. It has deep social media integration.
+ Easy to Understand Reports- One of the key features of any email marketing platform is reporting.  It's important to know how many emails were opened in your last campaign or what links were clicked.

Check out Mailchimp and see if it's a fit for your business.