WaStat – WhatsApp tracker - WaStat – WhatsApp tracker app shows the last online time of a phone number at a glance, so you can contact them whenever they get online to share something important to them.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Last seen tracker for WhatsApp - Last seen tracker for WhatsApp app helps you save all your WhatsApp data on the internal storage to view all your recent conversations at a glance.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Whatsdog Last Seen - Whatsdog Last Seen app shows the accurate last online time of all the phone numbers in your contact list to message them right on time and get an instant reply from them.
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.