I use windows freeware application called Keynote (http://www.tranglos.com/free/keynote.html http://www.tranglos.com/free/keynote.html). It is basically a tabbe

I use windows freeware application called Keynote (http://www.tranglos.com/free/keynote.html http://www.tranglos.com/free/keynote.html). It is basically a tabbed notepad, where each tab is either a rich text file, or a tree with nodes.