I came across this post on the Flavorwire site showing a number of authors’ Outlines for their novels. I find it interesting to see both the similarities and differences between the various examples.

Personally, if I wasn’t outlining electronically, I would go for the spreadsheet-like format (although it only gives you 2 degrees of freedom, I wouldn’t be able to cope with a looser organisation). I’d be interested in seeing how some of these would look electronically – Scapple and Aeon Timeline would be my choices.