Microsoft has now tweaked its SkyDrive link to allow users to view and edit your Office documents without having a Microsoft account. Using Microsoft's Office Web Apps or Office 2013, you can create a URL of any document that you store online. You can then e-mail that URL to anyone who needs to view or edit your file. Previously, that process required your collaborators to sign in with a Microsoft account before they could tweak your document. Now that restriction is gone.