Vicinity - High Quality Ambient Background Sounds in your macOS MenuBar
Jodel - What is Jodel all about? Jodel is the community that shows you what's happening in your area in real-time.
chatback - Automatically connect to people around you & chat
Berkanan - Chat with people nearby. Even offline, on an ✈️.
BuddyPress - WordPress social networking in a box.
Treadie - Create your own micro-social network for topics