Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Calendar Lock PEA - Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM. Platform-independent, Open Source, no installation or registration required.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
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.
UKs Kalender - This program helps you organizing your dates and tasks and reminds you of upcoming events.