Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Alarmy - World's most annoying alarm app

Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Galarm - Social alarm clock and reminders

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.

Free Alarm Clock - Free Alarm Clock is a free, full-featured and user-friendly computer alarm clock for Windows.