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.
SIDEXIS 4 - SIDEXIS 4 efficiently structures workflow and intuitive design and serves as a basis for further planning and diagnosis.
Evolution - Apps/Evolution - GNOME Wiki!
Tx Studio - Tx STUDIO™, powered by Anatomage, is an integral part of the fast i-CAT™ workflow and provides the power of multiple software systems combined into one simple-to-use solution.