klik is the easiest way to use additional software on Knoppix/Kanotix, even while running from CD. Because one software package is always exactly just one file on your desktop, you can always delete software packages without any problems for other software. With a persistent home directory, you can even continue to use the software you installed after a reboot.

In order to install the klik client on Knoppix (Kanotix has the client preinstalled), press Alt-F2 and paste:

wget klik.atekon.de/client/install -O -|sh
Then you can point-and-klik install software packages.