Kajabi - Kajabi is the only Knowledge Commerce platform today with everything you need to market, sell, and deliver your knowledge online.
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.
WildApricot - WildApricot is a powerful cloud software to help you automate and simplify membership tasks.
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Tendenci - Tendenci - The Open Source AMS is a cloud-based all-in-one management SaaS solution for Non-profits and Associations.
Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.