Microsoft office 2013 customer preview (beta) ready to download. Includes Word, Excel, Outlook, Access, PowerPoint and OneNote, with all having Metro interfaces. This version only works with Windows 7 and Windows 8, and available for english and spanish languages. You can signup and download from here. Also, microsoft suggesting to download 32bit (x86) version for both 32bit and 64bit users.
You can direct download from here.
Beta key: JR3N8-YV72J-86V92-HC2PM-PRXTW
Also, you can get your own key with Microsoft Technet account from here.