UpToDate - UpToDate, the evidence-based clinical decision support resource from Wolters Kluwer, is trusted at the point of care by clinicians worldwide.

Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.

WellApp - WellApp provides you a simple and easy path to communicate with patients and doctors.

Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES

MobileDDx - MobileDDx is an absolutely free application that is designed to locate diseases, symptoms, and medication in a very advanced manner.

Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates