Ask HN: What to show people when they say "Show me some cool things on Linux"

Hi, I run Archlinux (and xmonad) and sometimes when I am just sitting with my laptop people see my tiled windows or terminal or emacs or something and will say something like "Oh that's so cool! Show me something else!

This throws me off a little. This is what I have done in the past:

1. xcalib -i -a

2. xrandr -o left. One time when I did this two people started clapping.

3. ncmpcpp. People like the "rainbow music player" and its lyrics mode.

4. Sometimes out of boredom I will even do "dmesg". This always makes people go "oooh".

Could you tell me of other visually appealing little utilities in Linux? I don't use a desktop environment and don't want to install one. I hate compiz. No K-stuff either please.

Thanks,

xoxa