kindlecontrol a windows GUI to turn pages and use the kindle joystick from a PC window
https://www.mobileread.com/forums/sho...Kindle+Control
KJS a java script shell/interpreter kindlet
https://www.mobileread.com/forums/sho...vascript+shell
and a few arm executables I came across...
nano a curses(?) file editor
http://android.modaco.com/content/so...r-for-android/
shellinabox ajax terminal emulator providing shell access from a browser
https://www.mobileread.com/forums/sho...ht=shellinabox
bozohttpd the already listed "webserver" with cgi support
https://www.mobileread.com/forums/sho...ight=bozohttpd
mc a curses(?) midnight commander to navigate directories, view, edit, copy, move, erase.
https://www.mobileread.com/forums/sho...mmander&page=2
tcpdump to record ip packets (which can be interpret with Wireshark on the PC).
http://junxian-huang.blogspot.com/20...1-android.html
tcc the tiny c compiler which can compile on-the-fly (small) c programs on the Kindle itself.
https://www.mobileread.com/forums/sho...&highlight=tcc
... there is got to be many more