Some things I've found useful to add to knoppix from debian bullseye packages:


baobab (which you may know as the ubuntu disk usage analyzer)
xdiskusage
ncdu (netcurses text mode disk usage analyzer)


simplescreenrecorder

(need simplescreenrecorder_0.4.2-2+b1_i386.deb and
simplescreenrecorder-lib_0.4.2-2+b1_i386.deb)


osdclock (package name is osdclock)

osd_cat (package name is xosd-bin)