Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Qloapps - Open Source System - Build Hotel Booking Website and Manage Online & On-Desk Bookings.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
OrgBusiness Software - Organize, track, manage any information related to your home, business or organization.
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.
BSI Hotel Booking System - BSI Hotel Booking System is a real time online hotel booking.