Private Tracer is open source, privacy by design approach to contact tracing.
PrivateTracer
It Starts With You “Social Distancing” our best weapon against the Corona Virus Pandemic. We stand for Citizen Empowerment and Global Solidarity, because we believe that doing so, it will be a victory not only against the coronavirus, but against all future epidemics and crises that might assail h
Their change model involves creating code that empowers citizens to control and collaborate in tracking their own contacts