For those that like the history of the Cracking scene - there was a set of binary-patching SoftICE extensions called "nticedump" and "icedump". They were pretty nuts, too - one reverse engineer got annoyed by his music playback stopping when he was in SoftICE, so he hacked an MP3 player into the SoftICE driver.

http://n8on.free.fr/hackzines/bhz/7/crackingbeginner3.txt

There was also in-SoftICE tetris.

I used SoftICE extensively from 96-00'-ish ... to the extent that as a teenager I had single-step dreams and dreams where I tried to hit CTRL-D.