From Smyowl Desenv. de Softwares Ltda.:
SmyShare is the easiest way to share content with your friends on Facebook by means of using the "share charm" present in Windows 8. Just get that content you love to your social friends. It features easy content sharing to Facebook by using the Windows 8 Charm Bar, can share photos, videos, links, texts, and store apps, and keep the history of your shared content for easy reference.