Connecteam - Connecteam offers multi-functional team collaboration mobile application for companies that manage on-the-go teams.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Hubstaff - Simple yet powerful employee work tracker with screenshots, timesheets, billing, in-depth reports, and more. Understand productivity issues and act on 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.
Teleport Flock - Discover & budget group gatherings, anywhere in the world
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.