Today's tool is called ActionOutline. It's a software program created by a writer, for writers. It makes all your ideas and sets them in a tree format allowing you to plot an entire story, characters, subplots, and "card" them out without using index cards.
The program has two versions. A free version which limits you to seven subheadings per heading and you can't export to other formats. The pro version (paid version) does not have those limits. The free version has no time limit even though they do not advertise that fact.
Check out the tool here ACTIONOUTLINE.