klik allows you to install software by just klicking a button on the "point-and-klik software store".

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

Try it yourself: http://klik.sf.net/