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.
Ushahidi - Ushahidi gathers data from various sources and reports incidences around the world in real time.
Drupe - Next generation contact manager and dialer.
360social - 360social is a browser plugin that shows the social footprint of the people you want to connect with right inside your browser.
Simple Contacts - Contact lens prescriptions from home
AwesomeHunt - Community-curated lists of learning resources on any topic.