Sociall (Beta) - A secure and private decentralised social network for all.

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.

Manyverse - A social network off the grid

Drupe - Next generation contact manager and dialer.

data.world - The social network for data people

Simple Contacts - Contact lens prescriptions from home