A terrible name for a handy bit of software.
I think I've banged on about this in the past but currently working on something different for me - a multi-character/multi-storyline series that really needs to be well-plotted - and this piece of software is really helping.
Essentially it's a computer version of a whiteboard, but much more flexible and highly functioned-up.
And it's cheap.
Can't recommend it enough.
Happy writing!

I've just had a look at this and it looks like a really good tool. I am going to watch their 8 minute introductory tutorial later.

It's fantastic. To be honest I've just rediscovered it whilst trying to plot this big series. so much more than a whiteboard once you get into it. Look into Scrivener, too - their other product. I'd be lost without that too. And again - reasonable price.