Dragon Responsive Email Designer - Dragon Email Designer provides an intuitive drag and drop newsletter design tool.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Marble Responsive Email Designer - Marble helps you design beautiful and mobile-friendly emails and newsletters.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Kingmailer - Kingmailer helps you send, receive and route/forward emails.
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.