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.
LinkTag - Share your contact information and social media in one tap
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Poex - Customized tap & go products for all.
Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.
Kopier - Kopier lets you store your frequently shared profile links and access them lightning fast with shortcuts.