Why no LibreOffice AlienBob has put together a nice package here is the link for Slackware 14
slackware.com/~alien/slackbuilds/libreoffice/pkg/14.0/libreoffice-3.6.4-i486-1alien.txz
Here is the link for Slackware 13.37
slackware.com/~alien/slackbuilds/libreoffice/pkg/13.37/libreoffice-3.6.4-i486-1alien.txz
Download the packages, then navigate to the directory in which you have saved the files in your terminal and as root type
Code:
# installpkg <downloaded_file_Name>
Good luck to you.