FreeMind is the answer!
(free download track your languae, my winsnap photo show menu in Norwegian)
Best tool for a planning ingeneer. It's ideal for brainstorming, sorting out huge data announts and a platform before the large office document. In the free ver. you can rotate freely, numberise and export to html, copy and past in an office document.. wola you've got an indexed draft to use in Word or other Office tools. Mind mapping is an old tradition fist known by Porphyry (greek philosopher).
I use it a lot and it's highly recomended by me! Winsnap photo is taken from first draft of ITplan in Utsira Municipal.