Palaround - Meet people you should be friends with.

Attendify - Develop relationships at the events that you attend by creating smaller events with just a few people.

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

Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.

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

EventMobi - EventMobi is an interactive mobile event app, audience response and engagement platform for conferences and trade shows.