WhoShouldiFollow looks at who your Twitter friends follow to suggest new people. By adjusting the sliders on the results page, you can give greater preference in the ranking to less popular Twitter users, or those who are near you.
The algorithm is an item-to-item collaborative filter, somewhat similar to how Amazon makes recommendations.
Helping People to Keep their Contacts via their Business Cards\nNuebbo is an online card holder and contacts manager aimed to be the natural evolution of the business card on the web 2.0 environment. Easy, safe and free, Nuebbo provides you with a place where you can store and keep for future reference all your cards and contacts.