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.
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
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.
Palaround - Meet people you should be friends with.
PenPal World - Connect with people all over the world
Babble - A more personalized social network