FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
ABBYY Business Card Reader - Scan cards ≡ in a second and manage them everywhere ☁
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.
Scanbizcards - Maximize your marketing events ROI with ScanBizCards.
Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.
Haystack - Your new business card.