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.
Kin - Kin is money for the digital world. It is used to generate value through a shared, decentralized cryptocurrency in a digital ecosystem of apps and their users.
Cardbox - Contacts reimagined as a social network ✨
Plan - Plan is a better way to organize.
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Clean Google Calendar - Makes Google Calendar look nicer & launches as a desktop app