“Soocial provides a one address book solution to contact management. No matter where you add or change a contact, it will be changed in your other connected devices or web applications.”
#synchronization
Spanning Sync
“Synchronize Google Calendar and Apple iCal. Share calendars between multiple Macs. Share calendars with your coworkers, family, and friends. And while you’re at it, connect Google Calendar to your iPhone, iPod, and other devices.”