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.
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Cardbox - Contacts reimagined as a social network ✨
Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.
ContractHero - Intuitively organize contracts and be reminded of deadlines
puRRing - Cute cat videos with every incoming call on your Android