Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
RevenueWell - RevenueWell provides automated dental practice marketing and patient communications suite for dentists.
Geary - Geary is an email application built for GNOME 3.
Systems for Dentists - Systems for Dentists is a dental practice management software that allows you to configure the software to suite your practice needs.
Evolution - Apps/Evolution - GNOME Wiki!
PBHS - PBHS provides website design and practice marketing for the dental industry.