Microsoft on Tuesday launched its newest cloud service, Office 365, in 40 markets. The service consists of online versions of Microsoft Office, SharePoint, Microsoft Exchange, and Microsoft Lync. Pricing runs from $2 to $11 per user per month. Microsoft's building up an ecosystem around the service, and more than 20 service providers around the world, including several telephone companies, have announced they'll offer Office 365 to customers this year. Office 365 is in some ways Microsoft's answer to Google Apps.
Microsoft Office 365 is just like Google Apps but there is no free version as it is in Google Apps.
Explore the new Office 365 here: http://www.microsoft.com/en-ie/office365/online-software.aspx
You can check the trial version.