ConstantContact - An online based email marketing software with monthly subscription option. The interface looks really good and the templates are excellent.
Aweber - Nice online tool with lesser price than ConstantContact.
Email Marketing Software Express - An offline desktop based software with lifetime license.
Pros and cons:
ConstantContact and Aweber are good if you are okay to spent 100+ USD per month. If you want to use desktop email marketing go for Email Marketing Software Express which is just 25 USD for your lifetime. The issue is that your SMTP provider may not allow you to send more than 2000 emails per day, so you need third-party SMTP accounts like sendgrid to send more than 2000+ emails.
Happy email marketing...
---Taatine Paul, Marketing Consultant.