Envoy - Visitor registration that's changing how guests are greeted in companies around the world.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Teem - Cloud-based meeting room booking system
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
RobinPowered - Robin coordinates meeting spaces, people, and things in your office. Complete with analytics and insights that uncover usage and help optimize space.
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.