Palaround - Meet people you should be friends with.

Frysbe - Frysbe: Make global friends at random and the fling app comes up with features to send messages to strangers from every corner of the world to expand your social circle.

Digg - Digg delivers the most interesting and talked-about stories on the Web right now.

PenPal World - Connect with people all over the world

quippd - quippd is a social news site that anyone can edit.

Unbordered - Unbordered app comes up with features to help you in finding the perfect language practice and exchange partners so you can practice foreign languages right through your mobile phone.