Libre Office is a fairly complete Office suite, free and open source. Runs just fine on Windows 8. It will do far more than view. 
http://www.libreoffice.org/
How does this compare with OpenOffice? I ended up switching to OpenOffice because that dang ribbon interface on the newer MS Office drove me nuts. I've found the OpenOffice Draw application to be very powerful, but counter-intuitive. For instance, the arrow key always moves the object by 1mm even if the grid is set to English units. I was going nuts trying to figure out why my objects were always off-grid until I found out about this absurd behavior of the arrow keys (which can't be overridden) in the OpenOffice Draw forum. My workaround was to just always set my grid to 1mm, but if there's something better out there for free I'd be even happier.
Edit: I just downloaded and installed it. So far, so good. I had previously tried OpenOffice Impress (PowerPoint Workalike) to read
this Earl Geddes .pptx file about multiple subwoofers, but the fonts came out the wrong size, causing the output to be garbled. Looks perfect with LibreOffice Impress! I'll post a note about that at Earl's forum.
In checking further about this (which I should have done before posting), I see that LibreOffice is a fork of the OpenOffice source code. This looks very promising! Thanks for posting, Mike.
