SafeGraph is providing free access to their various datasets to help researchers, non-profits, and governments around the world with response to COVID-19 (Coronavirus). So far, 1,000+ organizations like the CDC are already in the consortium and are using SafeGraph and partner company datasets at no-cost. The data includes aggregated and anonymized datasets on social distancing and foot traffic to businesses. More details on the datasets here.
Ball State University has an agreement in place so any scholar on campus may access the full, free data set.