Keep In touch - Keep in touch with thousands of people

Kajabi - Kajabi is the only Knowledge Commerce platform today with everything you need to market, sell, and deliver your knowledge online.

The Contact Guru - Managing your contact list so you don't have to

Tendenci - Tendenci - The Open Source AMS is a cloud-based​ all-in-one management SaaS solution for Non-profits and Associations.

Cardhop - The Mac contacts app you'll want to use.

YourMembership - YourMembership provides membership management software integrated with social networking features.