Chemical entities that are kinase inhibitors, pharmaceutical compositions and methods of treatment of cancer are described. Specifically quinoxaline derivatives of Formula I: and their use in modulating the activity of B-raf and/or mutant B-raf kinase to regulate and modulate abnormal or inappropriate cell proliferation, differentiation, or metabolism are disclosed. Also disclosed are methods of treating cancer associated with B-raf and/or mutant B-raf kinase activity in a subject, comprising administering the compounds of Formula I.