EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

Insta HMS - Insta HMS is a cloud-based solution that can be used in multi-center clinics and hospital with security protocols.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

Qliq Secure Texting - HITECH and HIPAA compliant secure texting & text messaging app for hospitals, clinics, and healthcare facilities to assist medical professionals.

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.

TheraNest - Mental health software for psychologists, social workers, therapists, counselors.