Where can I download kvolmet?

The current version is 1.0p1. You can download the source tarball at
http://sourceforge.net/project/showfiles.php?group_id=75703.

For those who prefer RPMs: at the link above, you will find also binary RPMs for current versions of the SuSE distribution (not guaranteed, though).

An alternative download you find at apps.kde.com. Please visit
http://apps.kde.com/uk/0/info/id/2205.