If you are looking for a system with which import your contacts from online services, webmails, social networks etc., Open Inviter is the most complete, and it is also Free and Open Source . Do you want more, as there is a OpenPress WordPress plugin that automates and simplifies the process.
It is installed like any other plugin and from there the process is really simple. The only previous step is to enter your key Open Inviter API which you can get on the official site .
propo, Yandex, Hushmail, Azet, OperaMail, FastMail, ] GMail Zapakmail, Evite, Terra Mail.com, Netaddress, Gawab, Abv, AOL, Care2, 5Fm, IndiaTimes, Wp.pt, Mail.in, Popstarmail, Sapo.pt, Doramail, Mynet.com, Live / Hotmail Rediff, Clevergo, KataMail, Lycos, Nz11, Bigstring, Walla, Interia, Web.de, Libero, GMX.net, Uk2, Mail.ru, Inbox. com, Yahoo! Rambler, Badoo, Mevio, Plurk, Motortopia, Flickr Twitter Last.fm Facebook Multiply, Eons, Xing, Xuqa, LinkedIn, Friendster, Skyrock, Plaxo, Cyworld, Fdcareer, Kincafe, Brazencareerist, Flixster, Perfspot, LinkedIn Mydogspace, Flingr, Xanga, Vimeo Friendfeed, Hyves, Faces, Orkut, Konnects, MySpace Meinvz, Hi5 Famiva, Bebo, Lovento, Tagged, Livejournal Plazes, Mycatspace, and will soon also accept contacts from YouTube and some more.
If you were looking for something like this you can download it on this page . The use you make of it is already yours.