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.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
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.
Facebook Local - Discover places to go and events happening near you
PenPal World - Connect with people all over the world
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets