Everybody agrees the aircrack-ng group of commands is outstanding. But with 280 other software programs on BT2, what is the next useful program or programs for BT2 users?

Can the forum participants comment? What is your favorite non aircrack-ng program and what do you use it for?

I would like to experiement with other programs but would like to know where to start .... outside of the aircrack-ng series.