Groovor is an entertaining internet service that enables users to view and rate people's achievements as well as tell about things that make their life unusual.
ResearchGate is a network dedicated to science and research. Connect, collaborate and discover scientific publications, jobs and conferences. All for free.
Laut einer Forsa-Umfrage sind rund 30 Millionen Bundesbürger Mitglied mindestens einer Community. Dabei geht es den Nutzern in erster Linie um Kontaktpflege mit Freunden und Bekannten.