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.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Apple Mail - There’s big news attached.
Postbox - The Power Email App for busy professionals, like you.