Contact Grabber is an application to fetch contacts (i.e.) Address book from variuos email providers and social networking sites such as Yahoo, Gmail, AOL, Hotmail, Orkut, Facebook, bebp etc. Here i have given some examples.
Open Inviter is a free open source contact grabber from email providers like AOL, GMail, Yahoo, Rediff etc nearly 57 and from social networks like Orkut, Facebook, Hi5 nearly 47. This is not a widget like plaxo.
(This example has nearly 20 plugins such as AOL, Gmail, Yahoo, Orkut, Facebook etc.)