TaskBoard - A Kanban-inspired app for keeping track of things that need to get done.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Pintask - Pintask is the most customizable Kanban board.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
My Personal Kanban - This is a one page HTML/JavaScript application for people who would like to use simple and basic...
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.