I wrote a tool to slowly output a file, emulating, say, a 9600 baud modem. I use it to watch VT animations. I can't imagine what else you would use it for. Here it is:
http://members.cox.net/thebigbro/slowcat.c And I wrote a Sudoku solver/generator:
http://members.cox.net/thebigbro/sudoku.c http://members.cox.net/thebigbro/example.sh http://members.cox.net/thebigbro/empty.sh That is all.