Gemcitabine analogs, including monophosphorylated analogs, are described herein and are suitable for use in pharmaceutical compositions, kits and treatment methods. The treatment methods include treatment of viral infections, including, but not limited to, treatment of Hepatitis C Virus, and uncontrolled cellular proliferation, including cancer, such as, but not limited to, non-small cell lung cancer, pancreatic cancer, bladder cancer, breast cancer, liver cancer, esophageal cancer and lymphoma.