MyFitnessPal - Track the number of calories that you consume each day with MyFitnessPal. The app also lets you create a diet and track the exercise that you complete each day whether it's walking, running or some other type of program.
Kontact - Kontact is the integrated Personal Information Manager of KDE.
Fitbod - Personalized Strength-Training powered by Machine Learning
Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.
Fitocracy - Fitocracy is a social network that turns exercise into a cooperative and competitive exercise with friends, rivals, and strangers.
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.