Related projects

Some awesome related stuff on GitHub:

• hugobarauna’s fork — Yahoo! and Windows Live support
• elisehuard’s fork — Yahoo! support
• pietern’s fork — Superpowered Google support (batch processing, groups, editing)
• willbailey’s fork — Google signed secure requests, more contact data, avatars
• stuart’s google authsub — Ruby code implementing the Google Authentication for Web Applications API (AuthSub)
• pelle’s OAuth
• Identity Matcher extracted from Dopplr — Gmail, Live, FOAF, Yahoo, Social Graph, hCard, Twitter … this is gold (although messy)

Other sightings

• sunny/tangram-importer — Google (work in progress)
• kenfodder/live_contacts — Windows Live

Scrapers:

• cardmagic’s contacts gem — A universal interface to grab contact list information from various providers including Yahoo, Gmail, Hotmail, and Plaxo.
• Blackbook — AOL, Gmail, Hotmail, Yahoo! Mail