Palaround - Meet people you should be friends with.
GetYourGuide - Get tickets to the most popular attractions while travelling
Digg - Digg delivers the most interesting and talked-about stories on the Web right now.
Klook - Discover & book amazing experiences at exclusive prices
quippd - quippd is a social news site that anyone can edit.
Airbnb - Book unique places to stay and things to do.