Wildcard - Discover, connect and meet people at communities
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.
Shapr - A completely free way to build your professional network.
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.
LetsLunch - Do more with your lunch hour. Meet new people.
PenPal World - Connect with people all over the world