Clara - Clara is a virtual employee that schedules your meetings, getting you to the work that matters, faster.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Mia - Virtual assistant for meetings
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Mastermind Manager - Software for running mastermind groups
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10