Molmantinf medchem tool kit, includes dose to human prediction tool
https://molmatinf.com/medchemtoolkit

Medicines for Malaria Venture — computational tools, including PK tools
https://www.mmv.org/research-development/computationalchemistry

Useful Pharmacokinetic equations – University of Florida, Pharmacy
https://pharmacy.ufl.edu/files/2013/01/5127-28-equations.pdf

FDA approved drugs database
https://www.accessdata.fda.gov/scripts/cder/daf/index.cfm

Drug Hunter PK calculators
https://drughunter.com/practical-pk-calculators