The main page describing Google’s Contacts Data API, including photo management, updating contacts etc.
#addressbook
Picture Finder
Find pictures for people in your Address Book based on their email address.
CloudContacts
“The CloudContacts service takes your business cards and puts them to use! After we receive the cards, we turn them into contacts you can import into your email application, you can view your contacts online and export the contacts in a variety of formats.”
Soocial
“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.”
Contacts Data API
“allows client applications to view and update Contacts content in the form of Google Data API feeds. You can request a list of a user’s contacts, edit or delete content in an existing contact, and query the content in an existing contact.”
Rapleaf: Reputation Lookup and Email Search
Rapleaf: Reputation Lookup and Email Search
“The Address Book Reader returns the names and email addresses of the contacts in a webmail address book.” Simple API for loading people’s address books and then using that for invites etc.