Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Zoho Meeting - Free video conferencing, online meeting, desktop sharing solution from Zoho.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Airtime - Hang out with group video, share music & videos
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.
Voxox CloudPhone - Get a local or toll-free business number that automatically answers, routes and transfers calls, plus other professional business phone services.