Kingsoft Office 2013 for Windows has two editions, Office Free 2013 and Office Professional 2013.
To install Office 2013 on your Windows system, especially the latest Windows 8 system, follow this guide:
When install, you can choose individual programs, instead of the whole suite. See this guide: How to install individual Office 2013 programs.
For Professional Office 2013, here are some useful articles:
Kingsoft Office suite includes Writer, Spreadsheets and Presentation. It can create, edit and save documents in Microsoft Office 97/2003/2007/2010 formats. See this page for more details.