Download Microsoft Evaluations copies of Office 2013, Project 2013 and Office 365 etc.
You can download Microsoft Office Professional 2013, Project professional 2013 Office 365 ProPlus, Office professional Plus 2010 etc software evaluation copies from below Microsoft sites.
These evaluation copies are available for 60 and 90 days. In order to get evaluation download you must sign first and download the same. This is good way to start using new application and later make mind for purchase.
MICROSOFT EVALUTION CENTER: http://www.microsoft.com/en-us/evalcenter