Vicinity - High Quality Ambient Background Sounds in your macOS MenuBar
PenPal World - Connect with people all over the world
chatback - Automatically connect to people around you & chat
InterPals - InterPals is a friendly community of over 5 million friends, language learners, travelers and penpals.
BuddyPress - WordPress social networking in a box.
Anygram - Anygram app offers features that let you meet new people so you can make new foreign friends practice native languages to learn something new.