I would like to start a thread where everyone adds a unique thing that to them makes jailbreaking so important. I will start it off by stating winterboard since it allows me to make my phone look the way I want it.
yew HAVE to customise activator!! lets yew do anything from anywhere!! its so powerful but so under appreciated..without there would be no backgrounder, proswitcher or sbsettings!!! what kind of life is that?!!! so go in ur settings app and click on activator and customise away!! yew wont regret it!!
openssh is actually a pain if you don't have a wifi connection. iphone usb explorer is superior in the sense that you can plug in any iDevice and move/copy things on/off it when ever you want.
i would say categories is a must have for any jb'er. its right up there with backgrounder. you should really REALLY get it if you don't.