Kingsoft Office is a commercial, closed-source office suite developed by Chinese software developer Kingsoft. Components include: Kingsoft Writer, Kingsoft Presentation and Kingsoft Spreadsheet.
The basic version is free to use, but a fully featured Pro version is also available, for the differences see here.
The latest version Kingsoft Office 2013 is highly compatible with MS Office, but one of the drawbacks is that it doesn’t support OpenDocument Format. Instead you can export your documents to PDF, or save them as MS Office formats or Kingsoft Office formats.
Download Kingsoft Office from here. The latest Linux binary at the time of writing is Linux Alpha 12 Patch 4.
The package kingsoft-office_22.214.171.12480~a12p4_i386.deb will usually be in Applications > Files > Downloads.
To install I used gdebi, a simple tool to install .deb files ( search for gdebi in Software Center if you haven't installed it yet ).
Right click the package kingsoft-office_126.96.36.19980~a12p4_i386.deb and choose Open With GDebi Package Installer.
A lot of extra 32-bit packages will be installed if running a 64-bit system ( see Applications > System Settings > About ).
Kingsoft Writer, ongmani skin ( right corner > Skin manager ) :
Zsolt Ádám Albert has altered this skin a bit to have a more elementary look :
Download the needed wps_office_elementary_theme.zip from here.
Open a Terminal and :
sudo unzip -o wps_office_elementary_theme.zip -d /opt/kingsoft/wps-office/office6/res/themes
Start e.g. Kingsoft Writer and right click the top bar and check Use System Title Bar.