: A powerful, open-source suite that is highly compatible with .doc and .xls files.

: Lightweight and excellent for mobile/PC syncing. Professional editions of Office 2013? WPS Office

The most common way to get a cheap license is through digital key retailers. These sites often sell surplus "OEM" or "Retail" keys at a fraction of the original price. : You can often find Microsoft Office Home & Business 2013 Go to product viewer dialog for this item. for around $18.81 (down from $22.13). Mr Key Shop : This site offers Microsoft Office 2013 Professional Plus Go to product viewer dialog for this item.

: If a seller gives you a username and password instead of a product key, walk away. Those are often corporate accounts that can be shut down at any time. Can’t Find a Key? Try These Free Alternatives

: Many users prefer this because its interface is the closest "clone" to the modern Microsoft layout.