Haystack - Your new business card.
Tappy - Make remote teamwork easier, talk with single click
HiHello - Exchange contacts, seamlessly.
Neucards - Update your contact info with friends while protecting your privacy.
PING - PING (Partimage Is Not Ghost) is a free software Linux-based live CD ISO built upon the partimage...
Knowee - Don't print your cards - Impress your contacts.