Vicinity - High Quality Ambient Background Sounds in your macOS MenuBar
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.
chatback - Automatically connect to people around you & chat
Yochat - Yochat app enables users to get to know about strangers from a large number of countries from around the world by video chatting with them.
BuddyPress - WordPress social networking in a box.
PenPal World - Connect with people all over the world