You can download the most current binaries from:
http://koffice.kde.org/
or from one of many mirror sites. The current list of mirror sites
can be found at:
http://www.kde.org/mirrors.html
Note
It is important that you use a binary package which is compatible with your system.
If you use the Linux operating system and are unable to find a binary package
at the KOffice web site or one of its mirrors, you may be able to obtain one
from the website of your distribution.