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.

Clariti.app - Clariti is a team communication app that uses Artificial Intelligence to combine emails, chats, documents, calendar events and feeds on the same topic, in rich context-based Conversations to ensure your communication stays focused & organized.

FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts

CiraSync - CiraSync is a program that syncs and shares office 365 GAL contacts and calendars to smartphones.

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

Attio - Attio is a radically new type of CRM that is real-time, entirely customizable and intuitively collaborative. Using Attio, your team can create, build and deploy your CRM exactly as you want it.