Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Google Calendar - Spend less time managing your day & more time enjoying it
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Morgen.so - All-in-one Calendar, Tasks & Scheduler. Morgen is the single hub for everything that revolves around time management.