Clinicaltrials.gov counts 104 active studies in the US.
There is also SOLIDARITY, a WHO megatrial announced on Friday.
Drugs in Clinical Trials:
Chloroquine (Plaquenil) – 70 year old treatment for malaria repurposed. Only small open label trials done so far (here, here and here) show encouraging early results.
Siltuximab, Sarilumab and Tocilizumab – all IL-6 inhibitors (for anti-inflammatory conditions) repurposed and being clinically tested.
Remdesivir – previously tested for other viruses including Ebola. Two phase III studies initiated.