With the upcoming Windows 8, it was obvious to announce the next iteration of Office, so thats here as Microsoft unleashed and made available Office 2013 Customer Preview for download to general public for free.
Office 2013 Customer Preview which also named Office 365 Preview is a testing release for public, which is integrated with quite new improved features to all of its applications including Word, PowerPoint, Excel, Outlook, and OneNote.
Download Microsoft Office 2013 Customer Preview