Outlook.com, Microsoft's web-based email and calendaring client, is now open to third-party developers who want to build tools on top of it. Using the Outlook API, developers can build what ...

Microsoft Outlook is an email platform featuring calendars, contacts, file-sharing, and more. Microsoft folded MSN and Hotmail into Outlook years ago.

Microsoft has released its new Outlook client with updated features to members of the Office Insider channel.