DeltaSalesApp - Field Sales Force Automation & Field Force Tracking Software
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.
ReachOut - ReachOut is a field service management suite to streamline field processes with customizable mobile-based forms and workflow.
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Service Cloud Field Service - Service Cloud Field Service is a cloud-based field service solution designed to initiate customer service activities from anywhere.
Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.