Compounds of formula (I): and salts thereof, formulations thereof, conjugates thereof, derivatives thereof, forms thereof and uses thereof are described. In certain aspects and embodiments, the described compounds of formula (I) or salts thereof, formulations thereof, conjugates thereof, derivatives thereof, forms thereof are active on at least one Raf protein kinase. In certain aspects and embodiments, the described compounds are active in inhibiting proliferation of a Ras mutant cell line. Also described are methods of use thereof to treat diseases and conditions, including diseases and conditions associated with activity of B-Raf V600E mutant protein kinase, including melanoma, glioma, glioblastoma multiforme, pilocytic astrocytoma, colorectal cancer, thyroid cancer, lung cancer, ovarian cancer, prostate cancer, liver cancer, gallbladder cancer, gastrointestinal stromal tumors, biliary tract cancer, and cholangiocarcinoma. Also described are methods of use thereof to treat diseases and conditions, including diseases and conditions associated with activity of c-Raf-1 protein kinase, including acute pain, chronic pain or polycystic kidney disease.