Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Curve Hero - Curve Hero is a dental practice management that delivers office management via cloud, allowing you to access your patient data from anywhere
Geary - Geary is an email application built for GNOME 3.
Evolution - Apps/Evolution - GNOME Wiki!
DENTECH - Dentech dental practice management software provides software, clinical and hardware solutions for dental practices nationwide.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.