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.

Open Contacts is an advanced address book program for managing contact info of individuals and...

Access and edit your contacts from personal, business, and other accounts with the Contacts app.

Automagically scan biz cards into LinkedIn/Gmail contacts

Put the power of full contact information into your web or mobile apps.

Kontact is the integrated Personal Information Manager of KDE.

In our contact management software you can store fast and easily name, phone numbers, birthdays, address, company name, city, mobile numbers, insurance and loan info, e-mail addresses.

Windows has many extraordinary organizers, and in the event that you include distributed storage, then you presumably have more.

Contact lens prescriptions from home

KAddressBook stores all the personal details of your family, friends and other contacts.

The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.

Open Source

Memotoo allows you to sync your data (contacts, calendar, tasks, .) with phones (iPhone, Android, Samsung, ..

Free service that takes care of your contacts, calendars and more so you don't have to.