Latest version of Microsoft Office with SP2 (Service Pack 2)
Work on VISTA and WinXP!

Applications included in Office 2007 Enterprise:

Microsoft Access 2007
Microsoft Excel 2007
Microsoft Groove 2007
Microsoft Infopath 2007
Microsoft Onenote 2007
Microsoft Outlook 2007
Microsoft Powerpoint 2007
Microsoft Publisher 2007
Microsoft Visio Viewer 2007
Microsoft Word 2007

To find out whats new in Service Pack 2 see here:
http://support.microsoft.com/kb/953195.